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rikaikun icon

rikaikun

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

Users200KCurrent public install base
Rating4.7Store average score
Reviews1,865Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
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rikaikun Media preview

5 assets
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User Growth Over Time

200K200K200K200K200K2026年7月15日2026年7月18日2026年7月21日Latest: 200K
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7-day rating change

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4.66
Latest
4.66
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0.00
4.564.614.664.714.762026年7月15日2026年7月18日2026年7月21日Latest: 4.66
2026年7月15日2026年7月21日
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Technical snapshot

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Version3.2.26
ManifestV3
Size28.11MiB
Languages1English
Published
Store updated
Last crawled
English
Overview

Product summary

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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.

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.

Reviews

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Store average score4.7Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average4.4Average computed only from synced review bodies below
Reviews with text566Synced review bodies
Total ratings / reviews1,865Chrome Web Store public rating/review count

Store average score: 4.7. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.

5
387
4
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25
Piotr Adamowicz2019年9月4日
4

It's pretty great. If only it offered romaji transcription, it would be perfect.

Language en
Gabriel Ninô2019年8月20日
3

This is my favorite extension that does what this does. However, it doesn't work properly on Google Docs (it only analyzes single characters), and works weirdly in general in text fields, like Google Translate (doesn't seem to know exactly where characters really are). Also, C as non-changeable shortcut for copying sucks big time, because sometimes I want to copy the selected text, and it copies the entry. Actually, I'd expect to be able to customize or even deactivate all shortcuts separately. Unfortunately, I'm forced to use Yomichan with that meh interface, but at least it works properly everywhere.

Language en
2 helpful · 0 not helpful
黃宇承2019年7月25日
5

日語學習者的福音

Language zh
Ori Korenblat2019年7月24日
5

Really helps

Language en
Sunny D2019年6月26日
5

Excellent app. A wall I had in learning Japanese was my vocabulary. Having this app installed allows me to practice reading in context without having to use an online dictionary like Jisho every 5 seconds. It is not 100% flawless. Just wanted to make sure that is known, Ctrl+C will take the whole dictionary definition instead of the highlighted text. Manually right clicking and selecting Copy bypasses the issue but of course that's substandard. Additionally, Rikaikun has difficulty on raw unformatted text. It will constantly snap to words if the cursor is in white space. Here is an example on some random lyrics: https://gyazo.com/93fdbea9f324e094657446efc10a860b I attempted to add breaks (newlines, tabs) between each line in the console but they didn't stop the issue. I don't know if it's an issue with Rikaikun or if some formatting could fix it. But otherwise the extremely limited and livable bugs, wonderful gem of an app. Developer clearly took a lot of care in making it.

Language en
MrLeung992019年6月21日
5

This is very useful but does anyone know how I can enable this extension by default when I launch Chrome? Now everytime I must click on the icon so it's "On"

Version 2.5.57Language en
David Tang2019年5月25日
5

Extremely helpful! I would suggest this for all Japanese learners

Language en
Muhammad Ali2019年5月9日
5

Very Nice. Thank you for porting this extension to the Chrome Web Browser

Language en
Shiki Araya2019年4月14日
5

Very good extension for reading Japanese website for non-native Japanese.

Language en
Anonymous user2019年3月19日
5

It's a great extension! Would be amazing if the romaji was shown too.

Language en