Yaku: Japanese Dictionary

Yaku is an offline Japanese-English and monolingual dictionary built for learners and speakers. Featuring Material 3 design, Yaku has no ads, no analytics, no external telemetry, and no subscriptions. An internet connection is used to download dictionary files. Look up vocabulary, check verb conjugations, draw kanji by hand, read native monolingual definitions, verify pitch accents, or export study decks to Anki. KEY FEATURES * Japanese-English Dictionary: Over 200,000 entries with English definitions, parts of speech, kana and romaji readings, JLPT levels, and common tags (JMdict & KANJIDIC2). * Japanese Names Dictionary (JMnedict): Over 740,000 proper nouns, including surnames, given names, places, stations, and companies, in the Names search. * Offline Handwriting Recognition (Kanji & Kana): Draw unknown kanji, hiragana, or katakana. Powered on-device by the DaKanji CNN model via ONNX Runtime, recognizing 6,500+ characters with no telemetry. * Bilingual Example Sentences: Thousands of paired Japanese and English sentences from Tatoeba to see vocabulary in natural context. * Kanji Lookup & Stroke Order: Animated stroke order and step-by-step diagrams powered by KanjiVG, plus interactive radical search. Filter kanji by school grade and JLPT level. * Search & Tag Filters: Bidirectional search across English, kanji, kana, and romaji with de-inflection. Filter with tags like #common, #gairaigo, and #n1–#n5. * Monolingual Japanese Definitions (国語): Switch seamlessly from English glosses to native Japanese definitions (Wiktionary & Japanese WordNet) to build advanced comprehension. * Verb & Adjective Conjugations: Offline inflection tables for all verb classes (Ichidan, Godan, including special Godan subclasses, Kuru, Suru) and adjectives. Inspect 20 forms across polite, negative, past, potential, passive, causative, imperative, volitional, and conditional paradigms. * Built-in Thesaurus & Synonyms: Explore semantic networks and nuance clusters. Compare synonyms, hypernyms, and hyponyms to master subtle differences. * Sentence Breakdown: Paste full sentences to automatically segment them into individual words, conjugated forms, and particles with one tap. * Visual Pitch Accent: Master Japanese intonation with pitch visualizations powered by Kanjium and Wadoku. Displays high/low curves and overbar notation. * 1-Tap Direct Anki Export: Export vocabulary and lists directly to standard Anki decks (.apkg) on-device. Includes readings, sentences, and pitch diagrams. * Study Lists & Bookmarks: Save entries to favorites and organize custom study lists. * Loanword Etymology: Trace the origins of katakana loanwords to Dutch, Portuguese, German, French, Italian, or English. * Modular Dataset Toggles: Customize your experience by toggling pitch accents, names, monolingual definitions, conjugations, examples, synonyms, or loanwords in Settings. * Privacy: No accounts, no analytics, no external telemetry, and no ads. Dictionary files are downloaded when needed; lookups run on your device. DATA SOURCES & LICENSES Yaku builds upon open linguistic datasets curated by the Japanese language learning community: - JMdict & KANJIDIC2 (Electronic Dictionary Research and Development Group) - JMnedict Japanese names dictionary (Electronic Dictionary Research and Development Group) - Wadoku pitch accent data (Wadoku e.V. & Ulrich Apel) - Kanjium pitch accent data - Japanese WordNet (National Institute of Information and Communications Technology) - Tatoeba bilingual example sentences - KanjiVG stroke order vector data (Ulrich Apel) - DaKanji handwriting recognition model (Dariyooo) Full license texts and attributions are available inside the application settings.