Nihonten - Learn Japanese

Master Japanese your way

Nihonten combines spaced repetition science with AI-generated practice to take you from beginner to advanced. Whether you're preparing for the JLPT or learning for travel, Nihonten adapts to your level and targets your weak points.

— Available always —

OFFLINE DICTIONARY 212,000+ vocab entries. 10,000+ kanji. 828 grammar patterns. Full-text search with JLPT N1–N5 and Genki textbook filters. No internet needed — instant results, always.

SPACED REPETITION FLASHCARDS Every card tracks your memory strength and schedules the next review at the perfect time. Add cards from anywhere — dictionary, readings, OCR scan — one tap.

72-LEVEL JLPT PROGRESSION Structured levels from N5 to N2. Each level teaches kanji first, then vocabulary that uses them, then grammar. Master 90% to unlock the next. A clear path from zero to fluent.

KANA STUDY Learn hiragana and katakana from scratch with structured lessons, flashcard drills, and multiple-choice exercises. No account required.

IMAGE-TO-TEXT OCR SCANNER Point your camera at Japanese text. On-device recognition — no upload, no internet. Highlight what you want, tap any word to look it up, add it to your study cards.

ANALYTICS Track your streak, retention rate, and review count. 30-day activity heat map. 7-day upcoming reviews chart. See your progress at a glance.

— Additional features —

PERSONALIZED STUDY PROFILE A multi-dimensional map of what you know across recognition, recall, comprehension, and production. Every AI exercise targets your actual gaps.

AI IMMERSION READING AI-generated readings matched to your estimated JLPT level and drill on your weak points. Comprehension questions after every reading.

AI LISTENING COMPREHENSION JLPT Choukai-style exercises with audio. Three question types mirror the real exam: task-based, point comprehension, and general comprehension. Practice the format that counts.

AI TRANSLATION EXERCISES Translate between English and Japanese. AI grades accuracy, naturalness, and grammar. Get corrections, alternative phrasings, and explanations that teach you why — not just what's wrong.

AI CONVERSATION PRACTICE Roleplay real scenarios with AI characters. Order at a konbini. Chat with a coworker. Every message gets corrections, translations, and weak point highlighting.

KANJI STROKE-ORDER DRAWING Practice writing 6,400+ kanji with real KanjiVG stroke data. Three stages: trace with guides, write with reference, recall from memory. Spaced repetition schedules your next practice.

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