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

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. Features: * 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

4.7 out of 51.8K ratings

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Jenna “jendart” DrummondMay 21, 2024

Awesome extension, I've used it all the way from beginner Japanese to fluent and N1. If the definitions disappear like the below review, just press 'D' while the popup is showing and they will come back!

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MX VangMay 21, 2024

I love this extension, but every now and then, the meaning of the kanji stops appearing, defeating the purporse of this extension. Even when I restart my computer, it'll stay this way for a random amount of time before working normally again on a later day.

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Uriel ReyesMay 4, 2024



  • Version
  • Updated
    April 29, 2024
  • Offered by
    Erek Speed
  • Size
  • Languages
  • Developer
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.


The developer has disclosed that it will not collect or use your data.

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes


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