KanjiBox

KanjiBox is a focused Japanese kanji and vocabulary trainer for learners at every level, from first-time beginners to advanced JLPT N1 candidates.

🧠 Simple yet effective algorithm
Spaced Repetition System and smart Multiple Choice algorithm, combined to optimize your learning and track your progress

🌟 Multiple Modes to keep you motivated
From Flashcards, to Drill training, to Gamified Quiz

🤖 No AI Slop
KanjiBox was first released 19 years ago, and has helped hundreds of thousands achieve written Japanese mastery ever since. It does not, and will never, rely on half-baked LLM-driven content

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KANJIBOX IS SMART
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KanjiBox adapts to your performance by prioritizing items you struggle with, and reducing repetition of material you already know. As you progress, it will introduce new kanji and vocabulary, but always while following your pace.

Spend more time on what needs work, and less time reviewing what you have already mastered.

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KANJIBOX IS A MEAN TEACHER
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Behind the deceptively simple Multiple Choice Question format, is a well-oiled algorithm designed to trip you up: similar-looking kanji, subtle pronunciation differences, closely-related grammatical words…

Because the goal is to learn the language, not how to beat the test.

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KANJIBOX IS ENGAGING
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Exhaustive stats across levels and categories show you what you have mastered, what needs more practice, and how your results improve over time. Quiz mode adds a fun competitive element to your studying.

Because serious should not mean tedious!

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FEATURES
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• Full JLPT N5–N1 kanji and vocabulary coverage
• Sensei mode with 6,355 kanji, ~40,000 vocab words
• Beginner mode with hiragana and katakana
• Works fully offline
• Custom Study Sets
• Sync all learning stats and progress across devices
• Add-ons to practice handwriting kana and kanji
• Add-ons to practice specific grammar points

Whether you are preparing for the JLPT, studying Japanese at school, or building your reading ability for everyday use, KanjiBox gives you a clear and practical way to improve.

始めましょう！Let's get started!

Recent changes:
New:
- Resetting your learning stats now syncs safely across devices: your other devices notice the reset and ask whether to reset too, keep their data and restore your account, or decide later.

Improved:
- While that choice is pending, syncing pauses and a clear indicator shows why — no more silent merging of old progress back into a freshly reset account.