Kotobask: Japanese Vocabulary

Master 1,700 JLPT words with audio, examples, and sentence quizzes. Choose any 4 decks free, study offline, and follow readings in kana or romaji.

Kotobask is a fast, focused vocabulary trainer for JLPT preparation and for anyone building a solid Japanese vocabulary base.

STUDY 1,700 ESSENTIAL WORDS • Learn across 17 decks covering JLPT levels N5, N4, N3, N2, and N1 • Every word includes a reading, English meaning, example sentence, and audio • Choose any 4 decks free when you start, then unlock other decks individually

QUIZ YOUR WAY • Practice Japanese → English, English → Japanese, or Listening questions • Complete 1,700 sentence questions by choosing the word that fits each blank • Retry wrong answers, continue with fresh words, or focus on new and weak words • Start focused quizzes from Saved Words and My Vocab

READ WITH CONFIDENCE • Show complete example-sentence readings in hiragana or romaji • See the answer form exactly as it appears in each sentence • Turn reading support on or off at any time

HEAR EVERY WORD • Audio for all 1,700 built-in words and example sentences • Bundled audio works offline with no waiting or streaming

TRACK YOUR MASTERY • Five mastery levels from New to Perfect, based on recent answers and speed • Review streaks, accuracy trends, overall progress, and deck progress • Target weak words instead of repeating what you already know

MAKE IT YOURS • Save useful words for later review • Add personal vocabulary cards with My Vocab

PRIVATE BY DESIGN • No account required • No ads and no cross-app tracking • Learning progress is stored on your device and backed up under an anonymous ID

Whether you are preparing for the JLPT or reviewing Japanese on the train, Kotobask keeps every session short, focused, and satisfying.