Tae Kim's Guide to Learning Japanese
The classic free grammar guide that teaches Japanese from a Japanese perspective.
WebsitesCoursesBooksFreeBeginnerIntermediateA1–B1
What it actually is
Explains the language on its own terms — the copula, the real function of は versus が, plain form before polite form — instead of forcing it into English grammar categories. Completely free online, and available as a cheap ebook or app. It is dense and dry, uses casual forms early (which surprises people used to textbooks), and the last update was years ago, but as a grammar reference it has aged well.
What it covers
- Grammar
- Reading