Glosaire – Learn Japanese

Learn Japanese through immersion — from the videos you actually love watching.

Paste any YouTube link into Glosaire and it becomes an interactive Japanese lesson. Watch with color-coded subtitles, tap any word for an instant definition with furigana, save it to your personal dictionary, and practice with spaced repetition exercises built from the exact sentences you found. Real Japanese, real context, real progress — not textbook drills.

Whether you're just getting started, building listening comprehension through native content, or working toward one day watching anime without subtitles, Glosaire meets you at your level and grows with you.

▸ INTERACTIVE VIDEO LESSONS
- Paste any YouTube URL or browse the curated video library — music videos, vlogs, travel, street interviews, and more
- Tap any word in the subtitles for its definition, reading (furigana), and a contextual explanation
- Natural and literal sentence translations with grammar breakdowns
- Color-coded subtitles show which words you know, are learning, or are new
- Library organized by level, topic, and speech pace

▸ JAPANESE IMMERSION THAT STICKS
- Every saved word remembers the sentence and video you found it in
- Words resurface across new videos until you truly know them — we call these encounters
- Comprehensible input at your level: new words at your level join your learning queue automatically
- Frequency rankings drawn from thousands of hours of real Japanese

▸ SPACED REPETITION + REAL OUTPUT PRACTICE
Glosaire takes you all the way to producing Japanese yourself. Review with spaced-repetition flashcards, cloze fill-ins, pair matching, listening drills, kanji recognition, and kana drills for hiragana and katakana — then put it into production: type the missing word yourself with Typed Cloze, write full sentences from scratch with Sentence Generation, and shadow real sentences out loud. Every exercise is built from the vocabulary you met in your videos — so you learn to use Japanese, not just recognize it.

▸ TRACK YOUR PROGRESS
- See your Japanese vocabulary grow as you watch — word by word, video by video
- Example sentences matched to your level reinforce each new word
- Per-video comprehension score shows how much you understood
- Activity heatmap, streaks, and achievement badges keep your study habit alive

▸ WHO IS GLOSAIRE FOR?
If you've ever paused a video to look up a Japanese word, Glosaire was built for that exact moment. It's for learners who want to understand anime without subtitles, pass the JLPT, or build real Japanese fluency (nihongo) from content they love — not from textbooks. Beginners welcome: start with kana drills and slower, simpler videos, and let the library grow with you.

On desktop, Glosaire pairs with a browser extension for watching Netflix and YouTube with the same interactive subtitles.

Unlike translation tools that just show you what things mean, Glosaire builds your ability to understand Japanese on your own. Every feature — from interactive subtitles to spaced repetition — is designed to make you a better learner, not a more dependent one.

Learn Japanese. Watch what you love. Build real fluency.