Immersive Japanese — Japanese Vocabulary While Browsing

Make Japanese vocabulary part of your everyday browsing. Immersive Japanese brings Japanese vocabulary into the English websites you read and the YouTube captions you watch. Discover words while browsing, hover for readings and pronunciation, and save the ones you want to remember. Start with English text and hover to reveal Japanese. When you’re ready for more exposure, choose Japanese annotations or word replacement. You control how much Japanese appears. ── HOW IT WORKS ── • Browse English websites as usual. • Hover over highlighted words to see Japanese translations, kanji, kana, romaji, example sentences, and audio pronunciation. • Save words with one click, then review them with built-in spaced repetition. • Mark familiar words as known so they stay in English. No Japanese reading ability is required to get started. Use romaji at first, then switch to kana or kanji whenever you’re ready. ── JAPANESE VOCABULARY ON YOUTUBE ── Discover Japanese words inside English YouTube captions. • Replace selected English caption words with Japanese vocabulary. • Follow along with a transcript panel and click a subtitle to jump to that moment. • Use auto-pause and keyboard controls to move through subtitles at your own pace. Free includes N5 vocabulary in captions. Premium unlocks the additional vocabulary levels. ── MAKE IT FIT YOUR BROWSING ── • Choose hover-to-reveal, annotations above or below words, or word replacement. • Adjust how many words appear. • Show each word only once per page with first-occurrence mode. • Enable the extension only on selected websites, or block individual sites. • Use body-text-only mode to skip navigation, menus, and buttons. • Choose a light, dark, or automatic theme. ── FREE — NO ACCOUNT REQUIRED ── Start with: • N5 beginner vocabulary. • Website highlighting and YouTube caption features. • Kanji, kana, and romaji display options. • Hover popups with meanings, examples, and pronunciation. • Word saving and spaced repetition review. • A vocabulary progress dashboard. • Site controls and display settings. ── PREMIUM — $29 ONCE. NO SUBSCRIPTION. ── Everything in Free, plus: • N4, N3, N2, N1, and news/current-affairs vocabulary on websites and in YouTube captions. • CSV export of saved words for importing into Anki, tagged by JLPT level. Discover words while browsing, then bring the ones you save into your existing Anki routine. ── A COMPANION TO YOUR JAPANESE STUDY ── Immersive Japanese adds vocabulary exposure to the reading and watching you already do. Use it alongside lessons, textbooks, conversation practice, or your favorite study app. Encounter a word, explore its meaning, and review it later. It’s a way to add Japanese to your day, not a replacement for studying grammar or practicing the language. ── PRIVACY ── Word replacement happens locally in your browser. Page content and browsing history are not sent to our server. Premium license verification contacts our server to check your license. No page content or browsing history is included. No tracking. No analytics. ── QUESTIONS ── Do I need to know hiragana or katakana? No. Start with romaji and switch to kana or kanji whenever you’re ready. Does it translate entire pages into Japanese? No. It highlights or replaces selected English words with Japanese vocabulary, keeping the surrounding text in English. Does it work on every website? It works on most English websites. Compatibility can vary by website. Can I choose where it runs? Yes. Enable it only on selected sites or block sites you want to leave untouched. Is Anki required? No. Built-in word saving and spaced repetition review are included for free. Premium adds CSV export for people who also use Anki. What if I lose my Premium license key? Use “Lost your key? Recover it by email” in the extension popup, or contact support for help. ── ATTRIBUTION ── Japanese vocabulary data from JMdict, © Electronic Dictionary Research and Development Group, used under CC BY-SA 3.0. Kanji and kana stroke-order data from KanjiVG, © 2026 KanjiVG Contributors, used under CC BY-SA 3.0.