日本語の森 (Nihongo no Mori)
JLPT N3–N1 grammar taught entirely in Japanese by Japanese teachers.
YouTubeCoursesFreemiumIntermediateAdvancedB1–C1
What it actually is
Hundreds of free lessons working through JLPT grammar points in Japanese only, which doubles as listening practice and is the standard recommendation for N2 and N1 preparation. Free on YouTube; the company also sells structured online courses. Because it is all in Japanese with no English scaffolding, it is unusable below roughly N4 level.
What it covers
- Grammar
- Listening
- Reading