Jun Aida

Founder, LETIZIA — building Kotoba Dojo

About

Solo founder in Tokyo. No engineering background, no formal education path — I ship AI products purely by talking to Claude. 6 products since March 2026. Now building Kotoba Dojo: an English dojo where you describe what you see and an AI sensei grades you, belt by belt.

Links

Badges

Tastemaker

Gone streaking 10

Gone streaking

Gone streaking 5

Maker History

Kotoba DojoTrain your words. Command any AI
Aug 2026

🎉

Joined Product HuntAugust 6th, 2026

Forums

•

4h ago

Kotoba Dojo - Train your words. Command any AI

Kotoba Dojo is a gamified training ground for precise wording. You see a reference image → describe it in your own words → an AI regenerates the image from your description → you get scored on how close it got. Rank up from white belt to black belt. 22 languages. Credit system. Sign in with Apple/Google, Stripe, GDPR account deletion. Built by a solo founder with zero engineering background, using only AI coding agents. 16 days, ~40 hours of directed work, from blank to production.