Software at the crossroads of cultures.
Koryuu is a software studio and a growing home for apps, tools, and creative work. Instead of a separate website for every project, each one gets its own page here — one cohesive brand, many products.
The work spans macOS utilities, study apps, client projects, and research, united by a single idea: software made for the spaces between languages and cultures — and built to last.
Apps & tools
Native macOS utilities, study apps, and cross-platform products — built to feel considered and quiet.
Client work
Websites and software for clients, delivered with the same craft as the in-house catalogue.
Across cultures
A focus on the spaces between Arabic, Japanese, and English — trilingual interfaces, RTL, and more.
交流 — kōryū — is Japanese for exchange: people, ideas, and cultures flowing toward one another and meeting in the middle.
to cross, to mix, to exchange
a flow, a current, a stream
Romanized, it reads Koryu — with one more letter kept: the trailing u. That u is you — the person on the other side of the exchange. Every app here exists for someone, and that someone is built right into the name.
Founded and based in Tokyo · 東京