Works — Products Yuichiro Kuzuryu Has Built
Products I have worked on, from mass production at a large Japanese manufacturer to zero-to-one products at startups. More than 20 of them have been certified for markets worldwide.
Switch Science / contract development
- IoT QR reader for chocoZAP (with hacomono, 2023) — Entry QR reader deployed at about 1,000 chocoZAP gyms. Interview
- KANTAN Play core (2025) — A customizable portable electronic instrument built on M5Stack. Product page
Startups in Japan
- BOCCO emo and Romi (Yukai Engineering, 2018–2025) — Hardware architect for communication robots: circuits, wireless and manufacturing.
- DFree (Triple W Japan, now DFree Inc., 2016–2018) — Founding CTO. Wrote the core patent and led the first product from zero to production of thousands of units. Product site
Bay Area startup (Miselu)
- C.24 (2013) — Bluetooth MIDI keyboard for iPad; over $100,000 (¥10 million) raised on Kickstarter. Kickstarter / Engadget
- neiro (2012) — Android music keyboard shown at Google I/O. Engadget
Yamaha / Yamaha Motor
- RX-V357 (Yamaha) — 5.1-channel AV receiver that sold over 1 million units. Replaced its main processor and OS together with an Indian startup partner.
- AirWired (Yamaha, 2008–2011) — Low-latency (about 12 ms) uncompressed wireless audio technology and module, used in the PDX-50, PDX-W61 and YIT-W10. Led the module development with a Singapore startup partner and certified it worldwide. Developer interview (Yamaha)
- DSP-Z11 (Yamaha) — AV receiver.
- VasP (Vehicle as Probe) (Yamaha Motor U.S.A., 2015–2016) — Vehicle-mounted sensing of micro-environmental data (CO, CO2, NO2, ozone, SO2, noise). Exhibited at J-POP Summit 2015 in San Francisco, won the "Meeting of Mind" industrial hackathon, and was later spun out as veeple. Deck