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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Specifications 仕様
Layout Compatible with most 65% PCBs and plates, including KDFans’ DZ65 and YMD-65% ZJ68 by YMDK
Dimensions 340 × 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
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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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Key Information 重要情報
Units 50 × Carrara White / 50 × 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. 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 × 65% marble case, 1 X aluminium USB port, 4 X self adhesive silicone rubber feet and standoffs.
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If you have questions or thoughts, I’d love to hear them — your feedback will directly influence how the KOSANJI case takes its final form.
Thank you for reading this far. Truly!I will be uploading higher-resolution images to
Discord in the coming days, so please feel free to drop by and say hello.
