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Quick Look

Rikaikun provides instant Japanese word readings and English definitions on hover, aiding comprehension and learning.

AI Overview

Who is this for?

Japanese language learners and readers browsing Japanese content online.

Key Features

  • On-hover Japanese word definitions and readings
  • Switchable dictionaries (word, name, Kanji)
  • Text-to-speech for pronunciation
  • Clipboard functionality for flashcards
  • Customizable pop-up appearance

Reviews Analysis

Overall Sentiment

Overwhelmingly Positive

Users highly praise Rikaikun for its effectiveness in making Japanese text accessible and aiding language learning, with very few criticisms.

Note: AI analysis focuses on the substance and recency of reviews, which may differ from the overall store rating.


What Users Love

  • Extremely useful for reading Japanese online.
  • Great tool for Japanese language learners.
  • Helpful features like text-to-speech and flashcard creation.

Points to Consider

  • × Some customization options might be slightly obscure.
  • × Occasional minor glitches reported in specific browser versions.

Official Description

From the Developer


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

Your extension? Let us know if we can update or correct anything!

Key Info

  • Rating:
    4.7/5.0

    (1.9K ratings)

  • Users:200,000
  • Version:3.2.9
  • Updated:Oct 14, 2025
  • Developer:Visit Website →

Stats from Chrome Web Store