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Hiroshi Iwahara

Do you know the product "CUBI" ? It was made by my boss, whom I greatly respect, Mr. Akio Kamei. It's a CUBE box that has BINARY motion. It's one of the most difficult Karakuri to open. I was impressed by this box, and was determined to create Karakuri. Complex mechanisms and simple expressions produce functional beauty. I'll create those products.

This page is only for explanation of products.
This isn't a stock list.
Our stock list is on  Sale.

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PRODUCT ITEM

INFORMATION



STAR with a single stroke
RF-42

This work was designed for an exhibition that theme is gSpaceh.

You will be able to open the center box only when you move the five devices along each side in correct order. The hint of the order is cleverly hidden in the design of the inlay. It is an interesting item for the development of Karakuri. Generally, mechanisms that require one specific order to solve them tend to be complicated. This item is no exception. It may be said that the mechanism of this item is like a developed one of gUnusual Sloth (M-13) by Kamei.

Created : 04/2016

Size : 215~215~74 mm

Material :  magnolia, walnut, maple

 




Bean Bag Drawer 2
RF-41 This work was designed as a Christmas present for 2015.

This is a developed version of gBean Bag Drawer (RF36)h that was designed in 2013. The goal is to find the hidden deep inner space of the drawer.  You should move the four white plates in correct order.  Of course, itfs not quite that simple to open – you also need to consider other ways it all fits together.  When you feel the spring start to shift, you will know that you have successfully found the inner box.


Created : 11/2015

Size : 93~93~135 mm

Material :  walnut, oak, maple, bubinga, magnolia, etc.


Super-CUBI (the trinary system box)
RF-4-11

This is a remake of Super-CUBI. Two surface plates are on opposite sides of each other; #1 and #2, #3 and #4, #5 and #6.


Created : 09/2015

Size : 131 x 131 x 131 mm

Material :  shiuri cherry,  walnut, etc.

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Two-dimensional Secret Box

RF-40

This work was designed for an exhibition that theme is gTwoh.

Of course, a normal Secret Box is a three-dimensional item. This item was expressed in two-dimensions.  Even if the structure is made in two-dimensions, the inner space disappears. On the other hand, if it is made in three-dimensions, it becomes a normal Secret Box. Therefore, a structure that seems like it is between two-dimensions and three-dimensions was adopted. What does it mean? You will understand the Secret when you open it.

Created : 04/2015

Size : 200 x 170 x 60 mm

Material :  sophora japonica, Japanese raisin tree, katsura, etc.

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Secret Base@irengas)

RF-18-13 This is a remake version. The materials were changed.
The trick is same.

Created : 02/2015

Size : 90~90~67 mm

Material : oak, walnut, ancient katsura, rengas

Secret Base@iWN)

RF-18-12 This is a remake version. The materials were changed.
The trick is same.

Created : 02/2015

Size : 90~90~67 mm

Material : oak, walnut, ancient katsura

Secret Base@iM)

RF-18-11 This is a remake version. The materials were changed.
The trick is same.

Created : 02/2015

Size : 90~90~67 mm

Material : oak, walnut, ancient katsura, etc.

Confetto Box 2

RF-39 This work was designed as a Christmas present for 2014.

This work was designed as a Christmas present for 2014. This is a developed version of gConfetto Boxh that was designed in 2008. The original gConfetto Boxh was solved by using 2 plates in a special way. This time, you can use the same method to open. But, you need another idea to open. Or, we had better to say that you need two more ideas? There in only one compartment inside.
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Created : 11/2014

Size : 80 x 80 x 80 mm

Material :  magnolia, teak, metal pin

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Canon Chest
RF-38

This was made based on a special order. There are many Karakuri inside. Memory System(RF-13), itfs Control Panels, Flue Pipes, Wind Control Boxes (boxes to make one way wind by both movement of opening and closing the drawers), Final Secret Drawer (it will be unlocked by a certain melody), A Door that will be unlocked by 8 step 2-ary (Binary) movement of drawers, A Door by 18 step 3-ary, A Door by 32 step 4-ary, and A Door by 50 step 5-ary. This item was ordered and designed under the influence of an item by Kagen Sound who applied a pipe organ to a puzzle in 2011.

Created : 09/2014 finished, (designing started from 2012)

Size : 1840x 870x 1600 mm

Material :  Amboyna burl, Yanase Cedar, Shiuri Cherry, etc.
Furniture Craftsman: Yukio Ogura




Super-CUBI (small)
RF-4-10 This Super-Cubi (small) was designed smaller than the original for special entry into the global eApothecary Puzzle Projectf. It involved 12 participants from 5 countries coordinated by Dave COOPER in Australia, with the carcass made by Robert YARGER in USA. In this small version some components were made from metal in order to accommodate the difficulty in making it this small.
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Created : 01/2012

Size : 76x 76x 76 mm

Material :  birch, walnut, stainless steel, others

Antique Radio

RF-37-1 This work was designed for an exhibition that theme is gNostalgich. There are two compartments inside. One is under the speaker, and another is under the tuning meter. Please unlock each space with three dials. Each space unlocks differently. Please observe the radio carefully, and use that as a hint.
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Created : 03/2014

Size : 160x 126x 88 mm

Material :  walnut, magnolia, etc.

Antique Radio

RF-37-2 This work was designed for an exhibition that theme is gNostalgich.This work is basically the same as RF-37-1. The difference is the position of the speaker and the tuning mater. When RF-37-1 was produced, only two copies of RF-37-2 were produced at the same time.
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Created : 03/2014

Size : 160x 126x 88 mm

Material :  walnut, magnolia, etc.

Bean Bag Drawer

RF-36 This work was designed as a Christmas present for 2013.
The drawer is partitioned off. It is easy to open out halfway. Please open the drawer completely by moving the two devices. This work was named for the image of the solution by the craftsman. That might be your hint.
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Created : 11/2013

Size : 81x 117x 60 mm

Material :  walnut, magnolia, keyaki (zelkova), rengas

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Another binary drawer

RF-35 The gbinaryh is used by different way until now. This way may be more primitive usage. Unlock the drawers by moving the bars. To see the number of 3 and 8 did you get a hint? Each bar means each place of binary. When a bar is opened, it means 1, and a bar is closed, it means 0. Each drawer means 0, 1, 2, c.and 7. gMove up of digith is expressed more exactly. Similar mechanism will be possible at trinary and others. But, more than at least 18 drawers must be made in case of trinaryc

This work was designed for an exhibition theme of "palpitate".

Created : 03/2013

Size : 139x 246x 69 mm

Material :  wanut, zebra wood, Magnolia, maple, birch, padoauk

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Half-finished box

RF-34

This work was designed as a Christmas present for 2012.

There are two compartments inside like RF-22. There is an A mark inside the first compartment and a B mark inside the second compartment. A is easy to open, but B is not. The idea of this trick is not the newest, but it was arranged systematically as a cube so that all the 6 aspects move.


Created : 12/2012

Size : 85 x 85 x 85 mm

Material :  ancient keyaki

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Super-CUBI
(the trinary system box)  <race wood>

RF-4-7

This is a remake version of Super-CUBI. To say about the surface plate, #1 and #2, #2 and #3, c#5 and #6 are neighbors each other.

Created : 09/2012

Size : 131 x 131 x 131 mm

Material :  walnut,  race wood

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Super-CUBI
(the trinary system box) <birds eye maple>

RF-4-8

This is a remake version of Super-CUBI. To say about the surface plate, #1 and #2, #2 and #3, c#5 and #6 are neighbors each other.

Created : 09/2012

Size : 131 x 131 x 131 mm

Material :  walnut,  bird eye maple

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Super-CUBI
(the trinary system box) <Yosegi>

RF-4-9

This is a remake version of Super-CUBI. To say about the surface plate, #1 and #2, #2 and #3, c#5 and #6 are neighbors each other.

Created : 09/2012

Size : 131 x 131 x 131 mm

Material :  walnut,  keyaki (zelkova), etc.

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Wave Box (with a crayon)

RF-33 This work was designed for an exhibition that theme was "living".
There are 17 pieces of plates on the top of this work. Each plate works freely. While you open the drawer, the each plate will make an interesting move. The crayon put up in the edge of the work is a key of the drawer. This work isnft difficult to open. What kind of image will be drawn with the crayon?
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Created : 03/2012

Size : 66~168~66 mm

Material :  walnut, oak, padoauk

Box with a tree

ikeyaki < zelkova >)

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RF-14-3 @

These are the remake version of the gBox with a treeh. The materials of the surface board were changed. As many of you know, the side plates must move in a special way. For this reason, more experienced skills are needed. The side plates were made somewhat loosely.

Created : 02/2012

Size : 117~81~62 mm

Material :  keyaki (zelkova), katsura, acrylic board

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Box with a tree@ichanchinj

RF-14-6 This is the remake version of the gBox with a treeh.
The materials were changed.
The trick is same.
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Created : 02/2012

Size : 117~81~62 mm

Material :  chanchin, katsura, acrylic board

Box with a tree@isophoraj

RF-14-7 This is the remake version of the gBox with a treeh.
The materials were changed.
The trick is same.
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Created : 02/2012

Size : 117~81~62 mm

Material :  sophora japonica, katsura, acrylic board

Secret Base@iB)

RF-18-8 This is a remake version. The materials were changed.
The trick is same.

Created : 02/2012

Size : 90~90~67 mm

Material : oak, walnut, ancient katsura, etc.

Secret Base@iR)

RF-18-9 This is a remake version. The materials were changed.
The trick is same.

Created : 02/2012

Size : 90~90~67 mm

Material : oak, walnut, ancient kastura, etc.

Secret Base@iY)

RF-18-10 This is a remake version. The materials were changed.
The trick is same.

Created : 02/2012

Size : 90~90~67 mm

Material : oak, walnut, ancient katsura, etc.

Secret Base 2

RF-32 This work was designed as a Christmas present for 2011. This is a gSisters workh of gSecret Baseh (RF-18). The second compartment of the RF-18 is opened by a special operation. This work will be opened by same way. But, at first, you canft do the operation.@You need a new idea to do the special operation. There is only one compartment inside.

Created : 11/2011

Size : 90~90~75 mm

Material : oak, walnut, birch, bubinga, others

Sliding 3 Drawer Chest (White)

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RF-24-3 RF-24 was reproduced. The mechanism is same as the previous RF-24. You can unlock the drawers by sliding the body. The size became a little bigger. It became easy to make a little. The material was changed to oak. The oak is hard and you will feel that the work is solid and stable. The front design was also changed.
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Created : 10/2011

Size : 128~138~153 mm

Material :  oak, chestnut, corner stick of brass, and etc.

Sliding 3 Drawer Chest (Yellow)

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RF-24-4 RF-24 was reproduced. The mechanism is same as the previous RF-24. You can unlock the drawers by sliding the body. The size became a little bigger. It became easy to make a little. The material was changed to oak. The oak is hard and you will feel that the work is solid and stable. The front design was also changed.
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Created : 10/2011

Size : 128~138~153 mm

Material :  oak, chestnut, corner stick of brass, and etc.

Firewood

RF-31 This work was designed for an exhibition that theme was "forest".
The motif is firewood for fireplace. The trick is simple.
When you move the trick, a drawer will come out.
This motif "Firewood" was a trial for the craftsman.
Over ten kinds of woods were used for this work.
The materials are from all over the world.
The work became a colorful work.
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Created : 04/2011

Size : 128~98~93 mm

Material :  katsura, oak. rosewood, and others (more than 10 kinds)

Chiyo-Musubi

RF-30 When we tie up a belt or paper tape well, a knot that is called
"Chiyo-Musubi" is completed.
In Japan, it is said to be a lucky knot.
We can see it as a Chopsticks bag, and others.
The craftsman wanted to make a work based on this shape.
It has 19 moves, and the movements cross each other.
It was much more difficult to make than expectation.
Well, the shape of this "Chiyo-Musubi" is a Pentagon.
But, it is also possible to make a Heptagon.
Though, there is no plan to make it as a Karakuri work!
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Created : 04/2011

Size : 237~128~72 mm

Material :  walnut, oak, angsana

Secret Base

imaple (birds eye))

RF-18-5 This is a remake version. The trick is same. The middle layer was made with a newly devised structure. The reason is to stable the layer as much as possible.
The center part like a knob was also devised. Some customers put it upside down while playing. In fact, this how to put was unrelated to the solution.
But, with this as a hint, at the copies of this time, it is related to the solution a little.
This is by a slight playfulness.

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Created : 03/2011

Size : 90~90~67 mm

Material : shiuri cherry, oak, katsura, walnut, rose wood,  maple (birds eye)

Secret Base

irace wood)

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RF-18-6 This is a remake version. The trick is same. The middle layer was made with a newly devised structure. The reason is to stable the layer as much as possible.
The center part like a knob was also devised. Some customers put it upside down while playing. In fact, this how to put was unrelated to the solution.
But, with this as a hint, at the copies of this time, it is related to the solution a little.
This is by a slight playfulness.

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Created : 03/2011

Size : 90~90~67 mm

Material : shiuri cherry, oak, katsura, walnut, rose wood,  race wood

Secret Base

izebra wood)

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RF-18-7 This is a remake version. The trick is same. The middle layer was made with a newly devised structure. The reason is to stable the layer as much as possible.
The center part like a knob was also devised. Some customers put it upside down while playing. In fact, this how to put was unrelated to the solution.
But, with this as a hint, at the copies of this time, it is related to the solution a little.
This is by a slight playfulness.

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Created : 03/2011

Size : 90~90~67 mm

Material : shiuri cherry, oak, katsura, walnut, rose wood,  zebra wood

Box with a tree

(bubinga)

RF-14-4 @

These are the remake version of the gBox with a treeh. The materials of the surface board were changed. As many of you know, the side plates must move in a special way. For this reason, more experienced skills are needed. The side plates were made somewhat loosely.

Created : 01/2011

Size : 117~81~62 mm

Material :  bubinga, katsura, acrylic board

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Box with a tree

(lacewood)

RF-14-5 @

These are the remake version of the gBox with a treeh. The materials of the surface board were changed. As many of you know, the side plates must move in a special way. For this reason, more experienced skills are needed. The side plates were made somewhat loosely.

Created : 01/2011

Size : 117~81~62 mm

Material :  lacewod, katsura, acrylic board

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House with trees

RF-29 This work was designed as a Christmas present for 2010.

Do you know how to solve the "Box with a tree"?
If you know how, then that becomes a hint.
You can move the 4 plates freely.
But, the top plate won't open.
There are 4 trees on the top.
The direction of the trees are a hint in solving the box.


Created : 11/2010

Size : 78~78~57 mm

Material : false acacia, walnut, magnolia, angsana, keyaki (zelkova), zebra wood, ichii, acrylic boad, etc.

KING CUBI

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RF-28

This is the so-called "Quaternary Box". It takes 1536 moves to open. About ten years has passed since the creation of "Ternary Box". It was designed for the International Puzzle Meeting of 2010.
gBinary Boxh has a gUh-shaped groove for the trick. The gTernary Boxh has an gSh-shaped groove. Therefore, since the creation of gTernary Boxh, the designer thought that the "Quaternary Box" could have an gMh-shaped groove
somehow. But, in fact, the "Quaternary Box" also needed a groove that is shaped like a gCombh, not only an gMh-shaped groove. gUh-shaped groove, gSh-shaped groove and gMh-shaped groove have no branches. So, I will call the grooves like them as gSnakeh-shaped grooves. On the other hand, I call the groove that is just like gCombh, gCombh-shaped groove. Thus, it is expected that an gEven Number Notation Boxh is made of gSnakeh-shaped grooves and gCombh-shaped grooves, and
an gOdd Number Notation Boxh is made of only gSnakeh-shaped grooves. 

Created : 07/2010

Size : 188~188~188 mm

Material : shiuri cherry, angsana, maple, zebrawood, keyaki, stainless steel,

Byway Secret 4

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RF-27 This is the 4th type of the Byway Secret series. There are two compartments inside. Please try to find the second compartment. It takes 6 moves to open.

This work was designed for an international puzzle event that was held in 2010. Only about 10 copies were produced for Karakuri Club members.
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Created : 04/2010

Size : 52~68~45 mm

Material : magnolia, walnut, maple (birds eye)

Byway Secret 4-2

RF-27-2

This work has the same mechanism as the RF-27.
The material of the top plate was changed from
maple (birds eye) to zebra wood.


Created : 09/2010

Size : 52~68~45 mm

Material : magnolia, walnut, zebra wood

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Three color DANGO

RF-26

gThree-color DANGOh equals three lines. The turn of the each DANGOfs color is different from the other. You can move each gThree-color DANGOhright or left. There are three drawers in the lower part. All the drawers are locked. The front boards of the drawers are colored the same as DANGO.
Now, maybe youfve already figured out how to play with this work. By moving each gThree-color DANGOh, please unlock the drawers. From a structural perspective, the drawers come out only 18 millimeters. Then, please take the front board off for the top. Oops. Donft replace the front boards!
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Created : 01/2010

Size : 117~174~73 mm

Material : walnut, ichii, magnolia, mizuki(dogwood), birch

4 Direction Drawer
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RF-25 This work was designed as a Christmas present for 2009.There are 4 drawers. The direction of the drawers are all different from each other. Only the very bottom drawer isn't locked. When you move the drawers in a special way, you will be able to open the drawers in sequence. The goal is to open all the drawers at the same time. A mechanism called, "prevention of countercurrent" was needed to make this work. The device is fitted only between drawers next to each other. Therefore, it is possible to make a work that has 5, 6 and even more drawers, by piling up the same drawers in this work. This work has a similar mechanism to that of RF-22 "Confetto Box".

Created : 10/2009

Size : 106~106~ 115mm

Material : oak, walnut, karin, camphor tree, rose wood
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Secret Base (xellow)

RF-18-3

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It is a remake version of the gSecret Baseh. Only the material of the surface plates are different. The four plates of the surface are made of same color wood. The appearance became simple and refreshing.

Created : 12/2009

Size : 90~90~64 mm

Material : shiuri cherry, katsura, oak, walnut, ancient katsura, keyaki(zelkova)

Secret Base@(uermilion)

RF-18-4

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It is a remake version of the gSecret Baseh. Only the material of the surface plates are different. The four plates of the surface are made of same color wood. The appearance became simple and refreshing.

Created : 12/2009

Size : 90~90~64 mm

Material : shiuri cherry, katsura, oak, walnut, ancient katsura, karin

Sliding 3 Drawer Chest (Red)
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RF-24-1

At first, you can't open the drawers at all. When you slide the drawers each other well, you will be able to unlock the key.

Eight years has passed, since the RF-5 "Sliding 4 Drawer Chest" was designed. Finally, it was manufactured. The drawer was reduced from four to three, to cut the cost. The distance between upper drawer and lower drawer became near. Therefore, it became easier to make the mechanism comparatively

Created : 05/2009

Size : 120~130~150 mm

Material : amur corktree, chestnut, brass, etc.

Sliding 3 Drawer Chest (Black)

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RF-24-2

At first, you can't open the drawers at all. When you slide the drawers each other well, you will be able to unlock the key.

Eight years has passed, since the RF-5 "Sliding 4 Drawer Chest" was designed. Finally, it was manufactured. The drawer was reduced from four to three, to cut the cost. The distance between upper drawer and lower drawer became near. Therefore, it became easier to make the mechanism comparatively
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breated : 05/2009

Size : 120~130~150 mm

Material : amur corktree, chestnut, brass, etc.

flower

RF-23 This work was designed for the exhibition theme of gspringh. The motif is a Japanese traditional lunch box. There is an acrylic window board on top. You can see four pieces of scattered petals from the window but canft touch them. The bottom layer is the base. The upper two layers is the cover. Of course, the cover is locked. From the base, you can move the cover from front to back and right to left freely. When you move the cover, each petal also moves. To unlock the cover, move the petals and make a typical gflowerh. That is, you need to gather all the scattered petals togather. How do you do it?

breated : 03/2009

Size : 102 x 102 x 76 mm

Material : walnut, birch, maple, acrylic board, etc.

Confetto Box

RF-22

This work was originally made as a Christmas present for 2008, but after several years its now a mechanical piece. There are two compartments inside. The two lids are opposite each other. As you slide the four plates, the two lids can open. The first plate is quite easy to open, but you'll have to think about the second one!

Created : 11/2008

Size : 86~86~86 mm

Material : padock, shiuri cherry

Pencil Stand

RF-21

This is a work that you can use as a pencil stand. There is a small hidden space inside. It has 3 simple moves. But, it isn't difficult to understand it.

Created : 05/2008

Size : 95 x 95 x 140 mm

Material : rose wood, keyaki(zelkova), rengas, zebra wood, mizuki(dogwood)

Pencil Stand

RF-21-2 The mechanism is almost the same as the RF-21-1. But, additional secret space was made. To maintain smooth movement for the future, 3 boards were glued to make the pencil standfs board. The black color and the red color are easy to shift the colors to the white woods. The craftsmen worked hard to prevent it.  The gZebra woodh is easily broken in processing. Therefore, an unusual processing method was needed.

Designed : 01/2009

Size : 96 x 96 x 140 mm

Material : rose wood, keyaki(zelkova), rengas, zebra wood, mizuki(dogwood)

Acorn Box

RF-20

This box opens with only one move. The cover rattles. But, the cover doesn't open even when you pull it up or turn any points of the box. It was unveiled at an exhibition that was held in Feb. 2008 by the craftsman and Mr. Ninomiya. At the exhibition, a customer who experienced Karakuri for the first time opened it very quickly, but a veteran of puzzles needed 30 minutes. This caused a lot of laughter! The acorn is made of wood. This work was designed for the marriage party of the craftsman's friend. RF-20-1 is a commercial version of it.

Created : 02/2008

Size : 54 x 54 x 70 mm

Material : oak, ginkgo, katsura, enjyu, pao rosa

Acorn Box

RF-20-2

This is a revised edition of "Acorn Box". In comparison with the initial version (RF-20-1), the idea is the same. But the way to open the cover is a little different. When people tried to open this work for the first time, the cover fell onto the floor, because, they didn't know the solution. In RF-20-2, the mechanism has changed, and that won't happen. (For the time being, I'll produce RF-20-2 as the standard version.)

Created: 07/2008

Size: 54 x 54 x 65 mm

Materials: oak, katsura, enju, etc.

SUSHI

RF-19

This is one of the works that were developed for the cause of the concept to "make works associated with Odawara and Hakone". In Odawara, there are fishing ports and we can have fresh marine products. "SUSHI" is a famous food of Japan. The idea of making "Karakuri SUSHI" has appeared repeatedly among Karakuri craftsmen, but, it has never been made. If you know the solution, it isn't difficult to open. Please find two spaces inside. The hints are "how to eat" and "how to hold" them.

Created : 02/2008

Size : 120 x 180 x 90 mm

Material : ginkgo, shiuri cherry, mizuki, bubinga, zelkova, old katsura

Sushi

RF-19-2

When RF-19-1 was displayed at the exhibition, the craftsman heard various comments from customers. gWhen we dip the rice into the soy sauce, the rice will fall apart!g, gIfve never seen a square soy sauce plate!h Based on the opinions, RF-19-2 is a revision of RF-19-1. I studied so much about Japanese culture!

Created : 07/2008

Size : 120 x 180 x 90 mm

Material : ginkgo, shiuri cherry, mizuki, bubinga, inomi, old katsura

Secret Base

RF-18 It was created as a Christmas Present for 2007. The craftsman often watched TV robot animation. When a bad enemy destroys the town and the peace of the people, the shutter of a secret base that is hidden under the ground opens and a robot of the justice comes out to save the peace. It was an exciting scene. The shutter is the motif of this work. There are two spaces inside.

Created : 11/2007

Size : 90 x 90 x 67 mm

Material : shiuri cherry, oak, zebra wood, rengas, keyaki(zelkova), ancient katura

Secret Base

RF-18-2 This is a remake version of RF-18-1. The surface pattern was changed. The color of RF-18-1 was showy. The color of RF-18-2 is more subtle. Well, the design is not just a simple decoration. The inlay line is related to the device. You can see the read or orange lines. When you move the plates well, you can connect them. Then, you can open the second compartment. So, how do you connect the lines?

Designed : 02/2009

Size : 90 x 90 x 67 mm

Material : shiuri cherry, oak, walnut, old katsura, amur corktree, rengas, old keyaki(zelkova)

ONIGIRI (Rice Ball)

RF-17 The craftsman often had his mother cook ONIGIRI (a Rice Ball) when he was a child. He liked miso ONIGIRI and grilled ONIGIRI. Which kind of ONIGIRI did you like? The trick was made using the shape of the laver well. The two ONIGIRI are connected and move together. It has 5 moves. In addition, there are two extra spaces to be opened.

Created : 04/2007

Size : 100 x 200 x 100 mm

Material : walnut, berry, dogwood, ichii, old katsura

ONIGIRI (Rice Ball)

RF-17-2

This is a commercial version of RF-17-1. The mechanism is the same as RF-17-1. The traditional sheath under a real rice ball is "bamboo sheath" In both of the works RF-17-1 and RR-17-2, the "bamboo sheath" is made of the same wood. In the RF-17-1, it is very thin just like a real one. On the other hand, in the RF-17-2, the thickness of it is around two millimeters. It is stronger than the thin one. The size of the setting are a little different between RF-17-1 and RF-17-2.

Created : 04/2008

Size : 140 x 230 x 110 mm

Material : walnut, berry, dogwood, ichii, old katsura

Covered Chimney

RF-16 It was created as an Xmas Present for 2006. The theme of this work is the brick chimney that Santa Claus comes down. But, it is covered so Santa Claus can't come in. How do you open it? While you play with it, maybe you can find some hints to open the lid. In fact, the different color bricks is a hint. When you open it, maybe you can enjoy the transformation.

Created : 12/2006

Size : 84 x 84 x 84 mm

Material : katsura, walnut, berry, etc.

Ichigo Shortcake

RF-15

Although most of his works have been rather complex and difficult, this time he created a work that has a simple device. Since the exhibition theme is "Valentine", he tried to make his work pretty. When you move the device correctly you will be able to separate the cake from the plate and find a small space inside. I believe while he was making this he must have been studying the design eagerly since he ate 7 or 8 kinds of shortcakes. Therefore the title 15 (ichi-go, one and five, also meaning strawberry in Japanese) seemed natural. Now this ichigo shortcake is in front of you, how do you begin to eat it?

Created : 01/2006

Size : 140 x 150 x 95 mm

Material : Padauk, Dogwood, Zelkova, Maple, etc.

Box with a tree

RF-14 It was created as an Xmas Present of 2005. The appearance looks like a Secret Box, though there isn't any Mosaic pattern on the surface. On the top, there is a small decoration of a tree. You can find 2 plates you can move freely. Usually you move one plate at first. But, in this case that would be wrong. The important point is how to open the 2 plates. It takes only 4 ways to open the final plate. But, it may be difficult without knowing the solution. The small tree on top is also a hint.

created : 10/2005

size : 98 x 68 x 53 mm

material : Japanese walnut, oak, acrylic board, etc.

Box with a tree

RF-14-2

This is a remade version of a work that was designed for the 2005 Christmas present. It was made with different materials. It was made in one giant size. It has 4 moves. You need a special device to solve it. The decoration of the tree is a hint, too.

Created : 09/2007

Size : 117 x 82 x 60 mm

Material : Katsura, Teak, Rosewood, acrylic board

Memory Drawers

RF-13 This work memorizes 120 (The factorial of 5) kinds of turn to open the drawers. The big base is full of 30 device plates. The plates move vertically and horizontally, and change the arrangements when you open or close the drawers. The work memorizes the turn you closed the drawers just before automatically, and change the turn to open the drawers next. In theory, 6 kinds / 25 plates are needed to realize this system. But actually, instead of that, 3 kinds / 30 plates are used. Itfs a full-scale work that matches his previous gSuper-CUBIh. The designer was eager to make it since he began to make Karakuri. It will be a most favorite work for the designer.

Created : 04/2005

Size : 209 x 181 x 104 mm

Material : walnut, maple, silky oak, birch, rosewood, acryl

Cage Burr

RF-12 12 pieces parts moves on 12 pieces parts. The base is "Akadama" of Hakone Works. Each part has a pin or a simple groove, and control the movement each other. But, I think it isn't difficult for puzzlers to put together. Maybe I can't say it's an pure interlocking puzzle, because I used pins. I think I can expect to apply this mechanism for another works.

created : 07/2004

size : 127 x 127 x 127 mm

material : maple, keyaki, magnolia, rengas

b-w-secret-3.jpg (3795 oCg)

Byway Secret 3 (katsura, koyosegi)

RF-11 This is the 3rd one of the Byway Secret series.
For the present, maybe it's the last one of this series.
I name it another name, "Wrong side secret."
You can't see the decoration on it.
But, it was designed like this on purpose.
Can you imagine this meaning?
There are 2 compartments inside.
The first room is easy.
But, it takes 21 moves to open the second room.
I applied almost elements of traditional Himitsubako's main devices to my box.

created : 07/2002

size: 150x100x80mm mm

material: katura, etc.

Yosegi: Koyosegi

ura3.jpg (69444 oCg)

Byway Secret 3 (walnut, yellow-wave)

RF-11-2 It's also a Byway Secret 3 that has different color, and same mechanism.
As the material Walnut is heavier than previous Katsura, it looks solid.
It took enough time from the announcement of this Byway Secret 3,
I'll explain about the inside of this box, you can find Yosegi inside.
The Japanese name "Ura-Himitsu-Bako".
"ura" has another meaning and it's "inside out", in addition to "byway".
Like this, the mechanism of the box is "iside out" style,
and the surface pattern is also "insaide out" style.
You can see "Koyosegi" inside Byway Secret 3 (katsura),
and you can see "wave (blue-sea-wave)" inside Bway Secret 3(walnut).
Though the color of the wave is yellow. ("blue" is just the name)
The yellow color is shine in the quiet walnut color.

created : 07/2002

size: 150x100x80mm mm

material: walnut, etc.

yosegi: wave (yellow color)

pineapple-b.jpg (9434 oCg)

Pineapple Secret (twist, black)

RF-10 Itfs also a Himitsu-bako that has 18 plates and 33 moves.
Of course, Then the movement is also different.
The normal pine (RF-9) has a basic shape.
But, this pine has another twisted shape.
One sub mechanism is placed twistedly.
Then those 2 sub mechanisms will obstruct the main mechanism at different place.
Then this arrangement makes the answer of this twist pine different between normal twist.

not for sale

created : 07/2002

size: 160x160x160mm

material: katsura, wendge, keyaki, others

Pineapple Secret (twist, black)

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RF-10-2 This is the commercial version of the RF-10 Pineapple Secret (twist, black).
This is a Secret Box with 18 plate moves and has over 30 steps.
The shape of the body is a twisted polyhedron.
The movement is different from the RF-9-2.
The mechanism was changed only a little from RF-10 just a small adjustment.
The degree of difficulty in solving it will be almost the same as the RF-9-2.

Created : 09/2010

Size : 145~145~250 mm

Material : walnut, keyaki(zelcova), amur corktree

Pineapple Secret (normal, yellow)

RF-9-2 This is the commercial version of the RF-9 Pineapple Secret (normal, yellow). This is a Secret Box that 18 plates moves and has over 30 steps. It was redesigned in various ways to improve the precision. The body size is smaller then RF-9. This time, the leaf was produced, and it looks like a real pineapple. At the RF-9, the leaf wasn't produced because of the schedule.

Created : 12/2006

Size : 145 x 145 x 250 mm

Material : walnut, keyaki (zelkova), amur corktree

pineapple-y.jpg (9564 oCg)

Pineapple Secret (normal, yellow)

RF-9 Itfs a Himitsu-bako that has 18 plates and 33 moves.
I call 8 plates they are placed like the equator of the earth, gmain mechanism.h
They move like g4 moves Himitsu-bakoh as a whole.
Well, there are 10 plates placed like a cross on right and left hemispheres.
I call them gsubstitution mechanisms.h
When you slide plates, the sub mechanisms will obstruct the main mechanism with a time lag.
Then, you will have a hard time to open and close.

not for sale

created : 07/2002

size: 160x160x160mm

material: katsura, wendge, keyaki, others

b-w-secret-2-1.jpg (6551 oCg)

Byway Secret 2 (yellow)

RF-8-1 This is the 2nd version of the Byway Secret series. There are 2 rooms inside, and you'll be able to open the 1st room soon. But, it takes 10 moves to open the 2nd room, and you'll miss your way to open. The right side and the reverse side will intertwine and move each other. It was made with a new mechanism that is an application of traditional Himitsubako's bar device. The difference between yellow one and red one is only the color of inlay on surface. They have same mechanism.

created : 06/2002

size : 120 x 84 x 64 mm

material : walnut, katsura, etc.

b-w-secret-2-2.jpg (6720 oCg)

Byway Secret 2 (red)

RF-8-2
zebran.jpg (4179 oCg)

Blue zebra

RF-7 It's a puzzle version of dream of zebra. All the plate move same as the dream of zebra. But for example, it will be locked when you take mistake.
You can't open it easily.

Not For Sale

created : 08/2001

size : 120x120x120mm

material : cherry tree, etc.

b-w-secret.jpg (2642 oCg)

Byway Secret 1

RF-6 To say about traditional secret boxes, the outside plate moves. But, this is "Byway" type and It's new.

created : 08/2001

size : 88x88x88mm

material : walnut, etc.

Byway Secret 1

RF-6-2 The mechanism is same as the RF-6. The size of the appearance and the structure was changed. The box became stronger.

created : 08/2005

size : 108 x 84 x 72 mm

material : magnolia, maple, padock, old katsura

4hikidashi.jpg (3883 oCg)

Sliding 4 Drawer Chest

RF-5 At first, you can't open the drawers at all. You can slide the drawers each other and unlock the key.

Not For Sale

created : 08/2001

size : 190x170x200mm

material : oak, etc.

s-cubi.jpg (2359 oCg)

Super-CUBI

(the trinary system box)

RF-4 This box is developed by one of CUBI (the binary system box made by Mr. Kamei) It has the trinary system in it. You can open it with 324 moves. But, you need 324 moves to close it again. It's the world record. I think, you need a little patience. It was named by Mr. Steve Barnett.

created : 12/2000

size : 131x131x131 mm

material : cherry tree, walnut, etc.

s-cubi-2.jpg (6312 oCg)

Super-CUBI
(the trinary system box)

RF-4-2 This is a remake version of Super-CUBI. It also has the trinary motion. But, I changed the orders of plates to move. It has a new surface design and now you can't tell apart the 6 plates. It must be easier to lose your way. After an exhibition, I found a calling card inside. He appealed "I opened it !" Then this time, I put into a small card inside. What color is the word ? (Well, there isn't a prize !)

created : 05/2002

size : 131 x 131 x 131 mm

material : walnut, cherry tree, etc.

Super-CUBI
(the trinary system box)

RF-4-3 This is a remade version of Super-CUBI. It has 324 moves. The motion is the same as the RF-4-2. The word, "congratulation" was written on a small paper and put inside the box. What color is it this time?

created : 08/2007

size : 131 x 131 x 131 mm

material : walnut, cherry tree, etc.

Super-CUBI
(the trinary system box)

RF-4-4 It is a remake version of gSuper-CUBIh. A regular customer cried, gIfm tired when I move 300 times!h The craftsman understood that. Therefore, this time, the new copies were adjusted a little loosely. Well, have you ever heard gSpeed Cubingh of gRubikfs CUBEh? It is a speed competition. Top players seem to solve it in about 10 second. It is a unbelievable speed. By the way, the craftsman sometimes tries gSpeed Cubingh of gSuper-CUBIh. Now, the looser adjustment is suitable. Until now, Feb. 2009, his best record is 43 seconds. But, the Contestant population is maybe only one. Everyone, please try!

created : 01/2009

size : 131 x 131 x 131 mm

material : cherry tree, walnut, etc.

Super-CUBI
(the trinary system box)

RF-4-5 They are remake version of gSuper-CUBIh. RF-4-4ARF-4-5 and RF-4-6 have same mechanism, and different surface material. At the RF-4-1, #1 and #2, #2 and #3, c#5 and #6 are neighbors each other. At RF-4-2 and RF-4-3, #1 and #2, #3 and #4, #5 and #6 are in the other side each other. F-4-4, RF-4-5 and RF-4-6 are a type same as RF-4-1. The RF-4-1fs type is called gTwin Box Typeh from Kameifs gM-1-1 Twin Boxh. From the #1, the turn is Up, Front, Left, Down, Back, Right. On the other hand, RF-4-2fs type is called gBypath Typeh from Kameifs gM-11-2 CUBI (Bypath)h. From the #1, the turn is Up, Down, Front, Back, Left, Right.

created : 01/2009

size : 131 x 131 x 131 mm

material : cherry tree, old keyaki zelkova), walnut, etc.

Super-CUBI
(the trinary system box)

RF-4-6 They are remake version of gSuper-CUBIh. RF-4-4ARF-4-5 and RF-4-6 have same mechanism, and different surface material. At the RF-4-1, #1 and #2, #2 and #3, c#5 and #6 are neighbors each other. At RF-4-2 and RF-4-3, #1 and #2, #3 and #4, #5 and #6 are in the other side each other. F-4-4, RF-4-5 and RF-4-6 are a type same as RF-4-1. The RF-4-1fs type is called gTwin Box Typeh from Kameifs gM-1-1 Twin Boxh. From the #1, the turn is Up, Front, Left, Down, Back, Right. On the other hand, RF-4-2fs type is called gBypath Typeh from Kameifs gM-11-2 CUBI (Bypath)h. From the #1, the turn is Up, Down, Front, Back, Left, Right.

created : 01/2009

size : 131 x 131 x 131 mm

material : cherry tree, karin, etc.

burr.jpg (3480 oCg)

# Burr Puzzle

RF-3-1 This is an interlocking puzzle. Put the 42 parts together.

created : 08/2000

size : 112x112x112 mm

material : lengaus, oak

burr-w.jpg (3697 oCg)

# Burr Puzzle(worm-eaten wood)

RF-3-2 This is an interlocking puzzle. Put the 42 parts together.

(This is the same as "RF-3-1".)

created : 08/2000

size : 112x112x112 mm

material : lengaus(worm-eaten wood), oak

zebra-j.jpg (41079 oCg)

the Dream of Zebra

RF-2-1 This box has the same structure and Karakuri as the "12 Diamonds Box" has. I changed the surface design. I think that I could make more varied expression. (I may alter the material and the design.)

created : 03/2000

size : 120x120x120 mm

material : old katura, katura, cherry tree

zebra-w.jpg (48103 oCg)

the Dream of Zebra

RF-2-2

created : 05/2000

size : 120x120x120 mm

material : walnut, katura, cherry tree

zebra-t.jpg (49573 oCg)

the Dream of Zebra

RF-2-3

created : 05/2000

size : 120x120x120 mm

material : Tagayasan, katura, cherry tree

zebra-p.jpg (54331 oCg)

the Dream of Zebra

RF-2-4

created : 05/2000

size : 120x120x120 mm

material : purple heart, katura, cherry tree

zebra-k.jpg (52741 oCg)

the Dream of Zebra

RF-2-5

created : 05/2000

size : 120x120x120 mm

material : karinn, katura, cherry tree

hisigata12.jpg (74037 oCg)

12 Diamonds Box

RF-1

This box has 12 plates. Each of the plates has the same shape, and the same pattern. One of them is a lid, and you can open it. But, you can't at first. At first, you move the 11 plates in turn. At last, you can open the lid as the 12th operation. The motion is simple and not so difficult. I wanted to make an unusual shaped box.

created : 03/2000

size : 95x95x125 mm

material : walnut, cherry tree, oak

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