Prompt-based writing practice with structured feedback, natural rewrites, vocabulary suggestions, and tracked grammar mistakes.


Choose a suggestion, a translation task, or a dialogue prompt. Then write freely in Japanese. GokuGoku does not ask you to pick the right answer. It asks you to produce sentences yourself.
Each answer comes back with a natural rewrite, grammar notes, better word choices, and a history of the mistakes you keep making.
Recognition
Production
Flashcards like Anki train you to see 読む and recall "to read." That is recognition. But when you need to say "I read every morning," can you produce 読む in context?
Productive vocabulary — words you can actually use — directly predicts writing and speaking ability. Passive recognition does not. GokuGoku trains the reverse path.
With about 30 exercises a day — roughly 15–20 minutes — you build real productive vocabulary at a steady, measurable pace.
Weak words reappear sooner, mastered words fade to spaced review. These are words you can use — not just recognize.
One plan. Everything included.