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Kazutaka Yamamoto — Projects

The 9 projects I run as the person in charge.
Inspired by Pieter Levels (@levelsio), I'm sharing the 12-month process on X.

𝕏 @caz_kyamamoto · note @uninya

Companies

Uninya Inc. Web / system development · 20+ years
Athena, Inc. New AI products studio
MUGI, Inc. Artist royalty distribution · JPYC

All as CEO. Cited from @levelsio: "I do hire contractors for specific things."

Projects (9)

Postari

Live

A project of Athena.

🔗 Coming soon

CueFlow

Building

A service that automatically turns performance data (MIDI) into clean, readable sheet-music PDFs.

📈 Updates 🔗 app.cueflow.jp ↗

Copyright Management System

Live

Copyright and royalty management for independent artists.

🔗 Coming soon

Concafe OS

Building

SaaS for running concept cafés: cast sales aggregation, regular-customer CRM, shifts, and payroll. In development at a separate company.

🔗 Coming soon

Royalty Distribution System

Live

JPYC-integrated; a 3% fee returns 97% to artists. Built on the "Tamago Index" (a logarithmic visualization of social-contribution value). A MUGI business.

🔗 Coming soon

AI Profile Studio Japan

Soon

AI profile photos for job hunting and career changes. Fine-tuned on Japanese faces + industry-specific dress codes. An industry-specialized take on @levelsio's PhotoAI.

🔗 Coming soon

A series on AI × hardware — the exact setup I actually use.

🔗 ai-series.athena.asia ↗

Indie Job JP

Soon

A job board specialized for AI / indie hackers. A Japan-market version of @levelsio's RemoteOK.

🔗 Coming soon

Pieter Playbook JP

Soon

A complete record of the 12-month process. A strategy book in the same vein as @levelsio's MAKE Book. Planned for May 2027.

🔗 Coming soon

Personal activities

BlackPrince Lawsuit

In litigation

A damages claim over a former employee's unlawful conduct. Pursuing multiple cases in parallel, representing myself (pro se).

📈 Overview & history

Recent updates

2026-06

BlackPrince Lawsuit — Decided to prioritize filing the 2nd fiscal-year accounts (with our accountant) ahead of the store-damage claims. Read more →

2026-06

CueFlow — Even when the performance data is messy, it can now automatically find the odd spots and fix them. Piano scores are much more readable with less wasted whitespace. Read more →

Inspired by

Process

Progress, failures, and numbers — I share it all on 𝕏.
In 12 months (planned for May 2027), I'll tell the whole story in a retrospective note.