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AI Japanese writing coach. Grammar corrections, JLPT feedback, spaced-repetition vocab, and live furigana on videos. Write Japanese anywhere — MOJIIQ checks your grammar as you type. HOW IT WORKS Type Japanese in any text field on any website. Mistakes get a red underline instantly. Click the underline to see what's wrong, why it's wrong, and fix it with one click. That's it. WHAT IT CATCHES • Particle errors — を vs に vs が vs と (the #1 mistake for learners) • Verb conjugation — wrong te-form, stem errors, ichidan/godan mix-ups • Adjective errors — い-adjective + だ, な-adjective + の • Spelling — こんにちわ → こんにちは, katakana typos • 837 grammar rules run instantly, with deeper AI analysis after you pause JLPT LEVELS Set your level from N5 to N1. Corrections are tagged by difficulty so you see what matters at your stage. The extension tracks which patterns you use correctly over time — no quizzes, just real writing. EXTRA TOOLS • Autocomplete — suggests natural Japanese as you type • Hover dictionary — hold Alt/Option over any word for reading + meaning • Video furigana — adds readings above kanji in YouTube/Netflix subtitles • Vocab saving — save words for spaced repetition review (30 free, unlimited on Pro) PRIVACY Text is checked locally first. AI analysis runs on our server only when needed. No browsing data collected. No text stored without your consent. GET STARTED Install → create account → set your JLPT level → start writing. Free: unlimited instant corrections + 10 AI checks/day Pro ($7.99/mo): 100 AI checks/day + vocab decks + full JLPT tracking Pro+ ($12.99/mo): unlimited everything Privacy policy: [https://mojiiq.zistica.com/privacy](https://mojiiq.zistica.com/privacy)