Kotojutsu
A free, all-in-one platform to learn Japanese from N5 to N1
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KotoJutsu is a free Japanese learning platform built for learners from beginner to advanced. Study vocabulary, kanji, grammar, reading, and more with structured lessons, flashcards, spaced repetition, JLPT practice, and interactive exercises. Whether you’re starting with hiragana or preparing for JLPT N1, KotoJutsu brings everything you need to study Japanese in one place — completely free and without ads.
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PH · launched Oct 22, 2026 · 1 upvote (top 67%)
- Education
- Vertical SaaS
- B2C
- Not AI
- Commercial product
- Education
- Languages
Similar launches
See all 142 similar launches →Could you build this?
Partial The platform features (flashcards, spaced repetition, quizzes, progress tracking) are standard and vibe-codeable. The real value is in carefully structured, accurate JLPT-aligned content that takes linguistic expertise to produce.
What it would actually take: Use a standard web stack with a database for content and user progress, plus an SRS algorithm such as SM-2 or FSRS, which is available as open source. The hard part is curating thousands of vocabulary items, kanji, grammar points, and reading passages aligned to JLPT levels, which requires native-level or certified Japanese-language expertise and review. Audio and exercise quality also depend on that content work.
Competitors
Other products that read as similar to this one : 142 launches clear the similarity bar, closest 8 shown.
Attention rank: #60 of 143 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 341 days after the earliest competitor.
- KanaCraft Japanese · ph · 2026-10-16 · 1 upvotes · similarity 0.61
- Kaname: Japanese Grammar · ph · 2026-10-09 · 2 upvotes · similarity 0.54
- Nihongo no Practise · ph · 2026-10-21 · 1 upvotes · similarity 0.54
- Origa · ph · 2026-10-20 · 1 upvotes · similarity 0.54
- Diccionario Japonés · ph · 2026-10-06 · 1 upvotes · similarity 0.52
- GoMe Nihongo · ph · 2026-10-16 · 2 upvotes · similarity 0.52
- Maho Japanese · ph · 2026-10-08 · 1 upvotes · similarity 0.51
- Visual Japanese · ph · 2026-10-07 · 1 upvotes · similarity 0.49
Other launches for this product
- No other launches for this product.