Kotobask: Japanese Vocabulary

Kotobask is a fast, focused vocabulary trainer for JLPT preparation and for anyone building a solid Japanese vocabulary base. STUDY 2,500 ESSENTIAL WORDS • Learn across 25 decks covering JLPT levels N5, N4, N3, N2, and N1, plus General Essentials • Every word includes a reading, English meaning, example sentence, and audio • Choose any 5 decks free when you start, then unlock other decks individually QUIZ YOUR WAY • Practice Japanese → English, English → Japanese, Listening, or Sentence questions • Complete 2,500 sentence questions by choosing the word that fits each blank • Reveal an English hint when you need help with a sentence • Practice All Words, Saved Words, My Vocab, Topics, or Situations • Retry wrong answers or focus on new and weak words EXPLORE WORDS IN DEPTH • See clear representative translations with helpful alternative translations • Study separate meanings and example sentences for words with multiple meanings • Show complete example-sentence readings in hiragana or romaji HEAR EVERY WORD • Audio for all 2,500 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 • See mastery changes after practice • Review accuracy, streaks, activity, overall progress, and deck progress • Switch activity trends between week, month, and year views 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 building everyday Japanese vocabulary, Kotobask keeps every session short, focused, and satisfying.