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geekhack Marketplace => Interest Checks => Topic started by: KOBO ISSHI on Sat, 13 June 2026, 11:23:00

Title: (IC) KŌBŌ ISSHI — Exploring Stone as a 65% Keyboard (GB IS LIVE!)
Post by: KOBO ISSHI on Sat, 13 June 2026, 11:23:00
(https://i.postimg.cc/DwmsNkY5/Banner.png)

(https://i.postimg.cc/XqQ4MPD0/christian-2717805670.png)


The GB / order page is now live here:
JOIN THE GB HERE (https://koboisshi.com)


Hello Everyone,

What began as a simple curiosity with stone evolved into a two year-long obsession.

Today, I’m proud to present the KOSANJI case — a 65% exploration into marble as a keyboard.

Available in both Carrara White and India Green.


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(https://i.postimg.cc/gcC3bmfV/India-Green-Carrara-208.png)


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Specifications 仕様

　　　　　　　　　Layout　　　　Compatible with most 65% PCBs and plates, including KDFans’ DZ65 and YMD-65% ZJ68 by YMDK
　　　　　　　　　Dimensions　　　　340 Χ 145 mm
　　　　　　　　　Typing Angle　　　　6°
　　　　　　　　　Front Height　　　　~20 mm approx.
　　　　　　　　　Mounting Style　　　　Tray mount
　　　　　　　　　Finish　　　　Polished and sealed for protection, durability, and a smooth desk-ready finish
　　　　　　　　　Weight Estimate　　　　~2.0 kg approx.
　　　　　　　　　Standoffs　　　　Threaded screw-in standoffs — can be screwed in or removed for assembly and/or maintenance
　　　　　　　　　Top Design　　　　Raised forehead + functional pen groove for balance and utility
　　　　　　　　　Uniqueness　　　　Each case is shaped from a single block of marble, with natural variations in grain and veining — making every KOSANJI case visually unique



(https://i.postimg.cc/Cx1vzFx0/Screenshot-2026-06-13-213124.png)


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(https://i.postimg.cc/L6dYJv4L/India-Green-144.png)


(https://i.postimg.cc/mk44sc4v/Carrara-Marble-Case-15.png)


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Stone Variants 石の種類

　　Carrara White　　　　A classic Italian marble featuring soft grey veining on a clean white base. Refined, subtle, and timeless.
　　India Green　　　　A darker, more textured stone with deep forest tones and mineral complexity — visually striking yet balanced.
　　
　　Each case is shaped in-house from a single block of marble, with natural variations in grain and veining — making every KOSANJI case visually unique.




Inspiration 着想
　　
　　I’ve always admired the Japanese approach to craft — treating tools with intention, allowing materials to guide the process, and accepting that refinement takes time.
　　
　　Working with stone forced that mindset. It doesn’t bend easily to direction. It reacts, resists, and asks for patience. Precision meets unpredictability — both the challenge and the appeal.


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(https://i.postimg.cc/Dw1psCKq/Carrara-Marble-Case-39.png)

(https://i.postimg.cc/yxQ4ML82/India-Green-154.png)


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Key Information 重要情報


　　Units　　　　50 Χ Carrara White / 50 Χ India Green
　　Availability　　　　Additional units may be produced if demand exceeds the initial allocation.
　　Pricing　　　　Carrara White — $249 USD
India Green — $249 USD
　　Shipping　　　　$50 USD for the case (wrist rest will be a little extra) I’m based in Thailand, and due to the weight, shipping is costly, but I will do my best to absorb anything above the $50 charge within reasonable limits.
　　Production Lead Time　　　　90 days from the close of GB.
　　What's Included　　　　1 Χ 65% marble case, 1 Χ aluminium USB port, 4 Χ self-adhesive silicone rubber feet, and standoffs.
　　Update**　　　　Due to the number of recent requests, matching marble wrist rests will also be offered during the GB.
　　Update**　　　　Risers will be optional. Some interested parties have requested a flat base, so that option will also be available during the GB.



…………………………………………………………………………………………………..



The GB / order page is now live here:
JOIN THE GB HERE (https://koboisshi.com)

Thank you everyone for the feedback and support during the IC.


Discord: LINK (https://discord.gg/BAxDP32Pf)

Extra photos here: Gdrive (https://drive.google.com/drive/folders/1yCdpSp6PeclTYUAXpNx6lTBa3Tz32oxT?usp=sharing)


Title: Re: (IC) KŌBŌ ISSHI — Exploring Stone as a 65% Keyboard
Post by: GD on Sat, 13 June 2026, 13:14:25
Never seen a marble case before, this is sick. India Green is calling my name. Hoping this goes to GB.
Title: Re: (IC) KŌBŌ ISSHI — Exploring Stone as a 65% Keyboard
Post by: INFILTRATION on Sat, 13 June 2026, 16:53:53
nice!! marble for a case.. cant wait to hear the sound tests.. i am in for the green one for sure.. or maybe both depending on the price lol.hope you make it to GB
Title: Re: (IC) KŌBŌ ISSHI — Exploring Stone as a 65% Keyboard
Post by: KOBO ISSHI on Sat, 13 June 2026, 23:47:28
Quote from: INFILTRATION on Sat, 13 June 2026, 16:53:53
nice!! marble for a case.. cant wait to hear the sound tests.. i am in for the green one for sure.. or maybe both depending on the price lol.hope you make it to GB

Great idea. I'll get sound tests done on both cases asap!
Title: Re: (IC) KŌBŌ ISSHI — Exploring Stone as a 65% Keyboard
Post by: newzealot on Sun, 14 June 2026, 00:31:06
For your next keyboard, please make a 75% or larger!  :thumb:
Title: Re: (IC) KŌBŌ ISSHI — Exploring Stone as a 65% Keyboard
Post by: KOBO ISSHI on Sun, 14 June 2026, 07:56:12
Update:** Due to the number of recent requests, we will also be offering a matching marble wrist rest during the GB.  :thumb:
Title: Re: (IC) KŌBŌ ISSHI — Exploring Stone as a 65% Keyboard
Post by: KOBO ISSHI on Sun, 14 June 2026, 09:20:35
Quote from: newzealot on Sun, 14 June 2026, 00:31:06
For your next keyboard, please make a 75% or larger!  :thumb:

Either HHKB or 75% for sure.  :thumb:
Title: Re: (IC) KŌBŌ ISSHI — Exploring Stone as a 65% Keyboard
Post by: Alvi on Mon, 15 June 2026, 17:52:45
Lovely board - It reminds me of the marble TKL but I didn't like the plastic cover they had on that, which this fixes. Wrist wrest would be a must for this one!

It would be nice to customise the usb-c port at the back, as the gold is really not for me. Black or white would be nice as options, or none (if that's even possible)
Title: Re: (IC) KŌBŌ ISSHI — Exploring Stone as a 65% Keyboard
Post by: KOBO ISSHI on Mon, 15 June 2026, 21:55:03
Update** Sound recording equipment has been ordered. Aiming to upload sound tests to Geekhack and Discord this Sunday. Thank you for your patience 🙏🏼
Title: Re: (IC) KŌBŌ ISSHI — Exploring Stone as a 65% Keyboard
Post by: KOBO ISSHI on Mon, 15 June 2026, 21:59:13
Update** Risers will be optional. Some interested parties have requested a flat base. No issues on my side. The option will be available on the GB.
Title: Re: (IC) KŌBŌ ISSHI — Exploring Stone as a 65% Keyboard
Post by: KOBO ISSHI on Mon, 15 June 2026, 22:01:53
Quote from: Alvi on Mon, 15 June 2026, 17:52:45
Lovely board - It reminds me of the marble TKL but I didn't like the plastic cover they had on that, which this fixes. Wrist wrest would be a must for this one!

It would be nice to customise the usb-c port at the back, as the gold is really not for me. Black or white would be nice as options, or none (if that's even possible)

Thank you kindly for the feedback!

I do remember the TKL one, and I very much agree. I’ll definitely give TKL a go next year, but it’s probably the final boss of marble builds due to the need for a two-layer design.

Wrist rests will also be available during the GB. I’m working through the CAD now, then I’ll make a few prototypes and add them to the thread as soon as possible.

Regarding the USB-C port, no issue at all if you’d prefer not to include the aluminium piece. The port opening (tunnel section) is a little tricky to polish cleanly because of the size, which is why the aluminium insert helps mask that area. But if that’s not a concern for you, then all good.

I can still send the aluminium piece with the case anyway, and you could customise it however you prefer. For example, you could spray it with metallic paint until you find a colour that suits your build best. No harm in having options.  :thumb:
Title: Re: (IC) KŌBŌ ISSHI — Exploring Stone as a 65% Keyboard
Post by: KOBO ISSHI on Mon, 22 June 2026, 02:46:36
Quote from: INFILTRATION on Sat, 13 June 2026, 16:53:53
nice!! marble for a case.. cant wait to hear the sound tests.. i am in for the green one for sure.. or maybe both depending on the price lol.hope you make it to GB

Here are the sound tests:
:thumb: