Immerse Japanese — Learn Japanese While Browsing

Learn Japanese passively as you browse — English words swap to Japanese automatically. Hover for kanji, kana, romaji. Free for N5.

LEARN JAPANESE WHILE YOU BROWSE THE WEB Immerse Japanese turns your everyday browsing into passive Japanese practice. As you read English articles, news, Wikipedia pages, or YouTube subtitles, words are automatically replaced with their Japanese translations — kanji, kana, and romaji — right on the page. No flashcard apps to open. No studying sessions to schedule. Just browse, and absorb. Too busy to open a Japanese textbook? This is your answer. Browse in English, notice a Japanese word you don't know, save it with one click, and review it later with built-in spaced repetition. The words come to you — you don't have to go looking for them. ────────────────────────────────────── HOW IT WORKS ────────────────────────────────────── Immerse Japanese works silently in the background on every website you visit. At the replacement rate you choose, English words are swapped with Japanese. Hover any replaced word to reveal a popup showing: • The Japanese word (kanji + kana + romaji) • The English meaning • JLPT level badge (N5, N4, N3, N2, N1 and News vocabulary) • Alternative translations with their own JLPT levels • Example sentences from Tatoeba • Save button to add to your personal word list ────────────────────────────────────── KEY FEATURES ────────────────────────────────────── ✦ Works on any website — news, blogs, Wikipedia, Reddit, social media ✦ Works on YouTube subtitles — replaces words live in captions while you watch (Premium) ✦ 11,000+ English words mapped to Japanese; 22,000+ Japanese entries in the popup ✦ JLPT-aware — filter by N5, N4, N3, N2, or N1 to match your study level ✦ News vocabulary — includes contemporary words beyond JLPT levels for real-world reading ✦ Multiple display modes: romaji, kana, kanji, kanji+kana, or English highlighted ✦ Color-by-level highlighting so you can see difficulty at a glance ✦ First occurrence only mode — replaces each word once per page to reduce clutter ✦ Adjustable replacement rate — replace words partially to avoid seeing too many translations ✦ Body text only mode — skips navigation, buttons, and UI clutter from translation ✦ Ignore list — hide words you already know ────────────────────────────────────── SAVE WORDS & REVIEW WITH SPACED REPETITION ────────────────────────────────────── Click "+ Save" on any word in the popup to add it to your personal vocabulary list. The complete learning loop, without leaving your browser: 1. Browse any English page normally 2. See a Japanese word you don't know — hover for the full definition 3. Save it with one click 4. Review it later in the built-in flashcard system using spaced repetition 5. The word moves into long-term memory Already use Anki? Premium users can export their saved words directly to Anki and slot them into their existing deck. ────────────────────────────────────── JLPT COVERAGE ────────────────────────────────────── The dictionary is sourced from JMdict, the gold standard open Japanese dictionary, filtered and curated for learner quality. Every word is tagged with its JLPT level: • N5 — Core ~600 words (beginner) — FREE • N4 — Common ~1,500 words — Premium • N3 — Intermediate ~3,750 words — Premium • N2 — Upper-intermediate ~6,000 words — Premium • N1 — Advanced 10,000+ words — Premium • News & contemporary vocabulary — words beyond JLPT used in real-world articles, news, and media — Premium Enable only the levels you're studying — the extension will only replace words at or below your chosen level. Start free with N5 and upgrade when you're ready. ────────────────────────────────────── PRICING ────────────────────────────────────── Free — no account needed, no time limit: • JLPT N5 vocabulary • All display modes (romaji, kana, kanji, English highlighted) • Save words & spaced repetition review Premium — one-time purchase, no subscription: • Everything in Free, plus: • N4, N3, N2, N1, and news vocabulary — full 11,000+ word coverage • YouTube subtitle support • Anki export ────────────────────────────────────── FREQUENTLY ASKED QUESTIONS ────────────────────────────────────── Q: Does this work on YouTube? A: Yes. Immerse Japanese replaces words directly inside YouTube subtitles as they appear on screen. Q: Will it slow down my browser? A: No. The dictionary is loaded once and cached locally. Replacements happen instantly with no network requests. Q: What is the best Chrome extension to learn Japanese while browsing? A: Immerse Japanese is designed specifically for passive immersion — unlike lookup tools like Yomichan, it replaces words automatically so you absorb Japanese without changing how you browse. Q: Is it different from Yomichan or Rikaikun? A: Yes. Yomichan and Rikaikun are lookup tools — you hover over Japanese text to see a definition. Immerse Japanese works the opposite way: it replaces English words with Japanese on any page you visit, so you learn while reading English content. Q: Can I use this as a complete beginner? A: Yes. Start with JLPT N5 (the free tier) to see only the most fundamental Japanese words. Upgrade to unlock more vocabulary as you progress. Q: How many Japanese words does it cover? A: Over 11,000 English words are mapped to Japanese translations. The hover popup draws from a database of 22,000+ Japanese entries to show alternative translations and meanings. Q: Does it support romaji for beginners who can't read kana yet? A: Yes. Choose from romaji, kana, kanji, or kanji+kana display modes. You can also use English highlighted mode — keeps English on the page but highlights replaced words; hover to reveal the Japanese.