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Kotoba Dojo
Train your words. Command any AI
1 follower
Train your words. Command any AI
1 follower
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.
Hey Product Hunt. I don't write code. No degree. The only skill I have is describing what I want in words — and that skill is exactly what this product trains.
After prison I drove trucks. Then I started a small e-commerce side business and used AI to write product copy — without knowing the word "prompt." I just typed what I felt. That habit is also how I build software now: I can't code, so talking to AI agents is the only way I know. Kotoba Dojo is the 6th product I've shipped since March. Bootstrapped from Tokyo — no funding, no team, no hunter network.
The game: you see an image, describe it in your own words, an AI redraws it from your description, and you get scored on how close it got. White belt to black belt, 22 languages. The sensei — a Shiba Inu in a gi — tells you which words changed the picture.
Who it's for: anyone who uses ChatGPT, Claude, or Gemini at work but feels their prompts are vague — or anyone who wants to practice turning what they see into words.
Free to try, no credit card. You start with 10 rounds. The first gallery item is one full round if you want to watch before playing.
I've never learned the "right way" to do any of this, so I want your honest take:
1. Try one round — did the scoring feel fair? Did the sensei's feedback teach you something?
2. Is 10 free rounds enough to understand the game before the paywall?
3. If you use AI at work — would training like this actually help you write better prompts?
Ask me anything about building SaaS with zero coding background. I'm here all day (JST).
this is actually a pretty fun way to learn prompting lol, way better than just reading prompt guides