rikaikun shows the reading and English definition of Japanese words when you hover over Japanese text in the browser.

  • rikaikun
  • rikaikun
  • rikaikun
What is rikaikun?
Rikaikun is a progressive Chrome extension designed to aid in learning the Japanese language. It functions as a dictionary, providing instantaneous translations and readings of Japanese words when you hover over them. It incorporates additional features like text-to-speech support for pronunciation assistance, and a unique provision of transferring word definitions to the clipboard, thus enabling easy creation of flashcards. This tool is not only handy for language learners but also helpful for Japanese speakers wanting to translate phrases into English.
Users: 200,000+
Rating: 4.66 (1,846)
Version: 2.5.59 (Last updated: 2024-07-22)
Creation date: 2019-09-23
Risk impact: Moderate risk impact
Risk likelihood: Moderate risk likelihood
Manifest version: 2
  • clipboardWrite
  • storage
Size: 28.84M
Stats date:

Other platforms

Not available on Firefox
rikaikun (v2.2.3)
4.70 (12) 10,910+
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As a Japanese dictionary, rikaikun helps you look up the only the words you don't know without losing your place. It's also useful for Japanese speakers wanting to know how to say Japanese phrases in English.


  • Using shift or enter, switch between word, names, and Kanji dictionaries.
  • Enable text to speech in the options to hear Japanese words you look up spoken out load.
  • Press 'c' to copy the current word and definitions to the clipboard for making flash cards.
  • Customize how the pop up dictionary looks and what content it shows.

Activate the extension by clicking the 理 icon in the top right. When the introductory pop up appears, rikaikun is ready for action.

When it's activated, when you hover over Japanese words they'll be translated in a pop up. If you hit shift/enter, you'll see some information about the first Kanji.

Press 'd' to hide the English definitions; press it again to bring them back. (Also changeable on the Options page.)

Changelog: https://github.com/melink14/rikaikun/blob/main/CHANGELOG.md

User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
  • Useful for learning Japanese language
  • Works on multiple sites
  • Has been used for a long time (since 2008)
  • Intermittent functionality issues
  • Text-to-speech changes from male to female voice
  • Doesn't work on specific sites like Wikipedia
Most mentioned
  • Useful for learning Japanese language
  • Text-to-speech issues
  • Intermittent functionality issues
  • Doesn't work on specific sites like Wikipedia
Recent reviews
by DONGHA DONGHA, 2024-07-11

by Val Arc. Val Arc., 2024-07-10

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Risk impact

rikaikun may not be safe to use and it requires some risky permissions. Exercise caution when installing this extension. Review carefully before installing.

Risk likelihood

rikaikun is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this extension.

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