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Describe a reference image in your own words → an AI draws what you said → you're scored on how close it got.
A training game that sharpens how precisely you put things into words — and how well you prompt any AI.
You don't need to memorize prompts. You need to see — with your own eyes — what your words actually produce. Kotoba Dojo turns that into a game.
Free to try · No credit card required
Mondai — The Problem
AI courses hand out "magic prompts." They work once, then your situation changes. The prompt was never the problem — you were vague, so the answer was too.
This isn't prompt engineering. It's knowing what you want, precisely enough that an AI can act on it. Engineer or not, it's a muscle — grown through reading training.
Keiko — Training
You're shown an image. Your job: describe it so precisely that an AI could recreate it from your words alone.
Say it out loud or type it — no character limits, no tricks. The AI generates an image from exactly what you said.
Your result appears next to the target. The master scores you, shows what you missed, and what you nailed. Score 80+ to advance.
Jitsuen — The Demo
A real Level 12 round — the AI received nothing but these words.
Shōkyū — Promotion
Nin — Perseverance
Prove you can direct AI through a full real-world task, end to end.
Handle ambiguity: vague goals, missing information, changing requirements.
Ship something real, built entirely by directing AI. The final proof.
Gessha — Monthly Tuition
Not ready to pay? Watch a short ad and play free — white belt levels, forever.
Top-up credits never expire while you're subscribed.
Genten — The Origin
Kotoba Dojo was built by a founder with no engineering background, a middle-school education, and a prison record. Every line of code was written through conversation with AI — no programming, just words.
That's the whole point. Words, used well, can rebuild a life. This dojo teaches you to use them well.
Dō — The Way
"I have no engineering background. I run every product my company ships by directing AI with words alone. This dojo is the training I wish had existed when I started."
— Jun, founder of Kotoba Dojo · solo founder, Tokyo