tanirell

An applied AI lab. Building in Japanese.

A solo lab in Tokyo. Mostly consumer apps people use every day, and the pieces underneath that ship as SDKs. AI for the friction in everyday Japanese.

shipping now — consumer

In App Store Review · August 2026

ニホンシア (Nihonsia)

Japanese history, walked instead of memorized. A study game for the national university entrance exam — one island holds nine eras, and each stone on the trail is five questions, about a minute. 17 chapters, 575 questions. Built solo in 21 days.

tanirell.com/nihonsia →

earlier — consumer

In Development · July 2026

ことれん (Kotoren)

A conversation practice app for people who freeze up in everyday Japanese conversation. Real-time AI voice partner for low-stakes scenarios — first meetings, small talk, casual chat with colleagues.

kotoren.tanirell.com →

next surface — sdk

The pieces underneath the apps — packaged for other developers to build on. Details to follow.