練習センター — Japanese Exercises Hub
Turn 200,000+ words into focused practice: spaced repetition, flashcards, listening, typing, matching, fill-the-blank and speed drills.
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👋 Welcome to Nihoner 練習
Select a mode on the left and press Load / Refresh Pool. Nihoner pulls words from the Lexicon and generates exercises automatically.
- 🧠 Use Flashcards for fast review with 3D flip
- 🔁 Use SRS Review for long-term memory efficiency
- 🎧 Use Listening for pronunciation & ear training
- ⌨️ Use Typing Recall for active production
- 📝 Use Fill Blank to test reading in context
- ⚡ Use Speed Drill to push your reaction speed
Progress saved automatically for logged-in users; guests use localStorage.
How Nihoner Exercises Work
Every Lexicon entry becomes a smart exercise. Combine flashcards, listening, typing and speed drills with a built-in spaced-repetition system — important words return exactly when you're about to forget them.
📊 SRS Algorithm
Each answer updates the review interval (1 → 3 → 7 → 14 → 30 → 60 → 120 days). Wrong answers reset to 12 hours.
🎮 8 Exercise Modes
Flashcards, MCQ, Typing, Listening, Matching, Speed Drill, SRS Review and Fill-the-Blank cover all learning dimensions.
⭐ XP & Ranking
Earn XP on every correct answer. Streak multipliers reward consistency. Reach Kanji Master rank by staying active.
🎯 JLPT Filter
Filter the exercise pool by JLPT level (N5–N1) to focus your session on exactly what your exam requires.