rikaikun
rikaikun shows the reading and English definition of Japanese words when you hover over Japanese text in the browser.
#2 in EducationWhat users praise
- Hover over kanji for readings and meanings — "the best Japanese-learning tool", around since 2008
- Works even on PDFs; instant dictionary hints; has carried users from beginner to N1
- Intuitive; beloved by the Japanese-learning community
What users complain about
- Periodically stops showing meanings — "broken for months", fixed by reinstalling
- Fails on text with selection disabled and JS-blocking sites (ChatGPT)
- Shows character-by-character rather than whole words; no other translation languages
Compiled from real Chrome Web Store reviews. We only report what users actually wrote — no summaries were invented.
Score breakdown
Reliability0.69
Satisfaction0.56
Usefulness0.70
Safety1.00
Trust0.80
Substance0.85
Strongest: safety.
Based on 2K reviews · computed Jul 18, 2026. Bars show only what we could actually measure.
What we checked
50recent reviews read
MV3manifest version
3permissions requested
Jun 25, 2026last updated
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