Naruhodo — Furigana Japan

Naruhodo adds furigana (reading annotations) to kanji on any Japanese web page and includes a built-in Japanese-English dictionary with hover lookup — no internet required. Whether you're preparing for JLPT, reading Japanese news, manga, novels, or light novels, Naruhodo helps you read and learn naturally.

FEATURES

🔤 Furigana for Any Japanese Web Page
Toggle furigana above kanji on any site. Color-coded by JLPT level (N5–N1) so you can focus on words at your level. Use Adaptive mode to automatically hide furigana for words you already know.

🔍 Hover Japanese Dictionary
Hold Alt (Option on Mac) and hover over any word for an instant popup with readings, definitions, JLPT level, and pitch accent. Or enable Hover Mode for hands-free lookups. Compound words (like 東京都) are detected automatically. Powered by the full JMdict dictionary — 215,000+ entries, all running locally.

🔊 Audio Pronunciation
Hear any word spoken aloud — click the speaker icon or press P. Uses your device's built-in Japanese voice, no internet required.

📖 Example Sentences
See real Japanese-English example sentences from Tatoeba for thousands of words, with the target word highlighted. Great for understanding words in context.

📚 Vocab Bank & Anki Export
Save any word with one click. Tag and organize your vocabulary, filter by JLPT level, group by source page, and export to Anki for flashcard review.

✅ Known Words & Adaptive Learning
Mark words as "known" to track your reading progress. Load JLPT presets (N5–N1) to bulk-add words. Adaptive Furigana automatically hides readings for kanji you've already mastered.

📊 JLPT Learning Stats
See your JLPT coverage at a glance, track vocabulary activity over time, and view a difficulty badge showing each page's JLPT breakdown. Know exactly how much of the page you can read.

🌙 Page Dark Mode
Switch to dark mode for comfortable night reading. Darkens web pages for easier reading in low light, while keeping furigana colors and images intact.

🗂️ English Glosses for Grammar
Short English annotations appear above particles and grammar patterns in furigana mode, so you never lose track of Japanese sentence structure — perfect for beginners and intermediate learners.

🌐 Selection Translate
Select any Japanese text and click Translate (or press T) for an instant on-device translation. Uses Chrome's built-in Translation API — no internet, no API keys, completely private.

HOW IT WORKS
- Full JMdict Japanese-English dictionary (215,000+ entries) runs locally in your browser
- Japanese text tokenization by Kuromoji, also running locally
- 14,000+ example sentences from the Tatoeba Project
- Everything runs 100% offline — no data is sent to any server

Built with privacy in mind. No tracking, no analytics, no ads. Your reading data stays on your device.

Perfect for JLPT N5, N4, N3, N2, N1 preparation, reading NHK News, Japanese Wikipedia, light novels, visual novels, manga sites, and any Japanese text on the web.