typed-japanese

Why we included this project

For a developer who already thinks in TypeScript, Japanese grammar becomes something you can check rather than memorize: the library encodes grammar rules as types, so the compiler itself rejects a sentence with an invalid particle order or a wrong conjugation. That instant feedback turns studying into a debugging loop, which suits people who learn better by breaking things than by drilling flashcards. The repo also ships an in-browser playground with a verb lab, adjective lab, phrase builder, and sentence gallery, so you can experiment without any setup. There is a forward-looking angle too: the same typed format is proposed as a way for LLMs to return grammar analyses that a type checker can verify, instead of trusting free-form JSON. If you are curious how far type-level programming can go in encoding real linguistic structure, this is a fun and practical place to start.