10ten Japanese Reader (Rikaichamp)

Name: 10ten Japanese Reader (Rikaichamp)
Rating: 4.7528 (271 reviews)
Author: Birchill

By: Birchill Add-on

Quickly translate Japanese by hovering over words. Formerly released as Rikaichamp.

Overview

Firefox Add-ons Store

Daily users

22,658 ▲ 279

Data as of 2026-10-09

Rating:

4.75

(271)

Version:

1.28.0

Last updated: 2026-09-30

Features & Capabilities

10ten Japanese Reader (formerly Rikaichamp) is a Chrome extension that allows users to quickly translate Japanese text by simply hovering the mouse pointer over words. It displays dictionary definitions along with pitch accent and kanji stroke order animations to aid language learners.

Key features include automatic dictionary updates twice weekly, support for non-English dictionaries, translation of Japanese yen into other currencies, numbers, era years, unique Japanese measurements, and shogi notation. The extension handles diverse grammatical forms and characters, offers romaji transliteration, and supports vertical text and SVG content. Designed for simplicity, speed, and low memory usage, 10ten Japanese Reader is localized in Japanese and Simplified Chinese, making it a versatile tool for all levels of Japanese learners.

User Growth & Download Statistics

Add-on Education Programming

By:

Daily users:

Rating:

Version:

1.28.0 Last updated: 2026-09-30

Version code:

6455384

Creation date:

2017-10-20

Firefox add-on GUID:

{59812185-ea92-4cca-8ab7-cfcacee81281}

Firefox add-on numeric ID:

865744

Weekly download count:

183

Firefox on Android:

Yes

Risk:

Permissions:

Content scripts matches:

*
docs.google.com

Size:

18.23MB

Email:

in*****@birchill.co.jp

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-10-09

Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:: Birchill
Firefox Add-ons Store: https://addons.mozilla.org/firefox/addon/10ten-ja-reader/
Email:: in*****@birchill.co.jp
Website:: https://10ten.life

User Reviews

Overall, the add-on is widely praised as a valuable learning tool that’s easy to use. Reviewers highlight its hover dictionary and kanji decomposition as key strengths, making it a solid aid for building vocabulary. However, reliability concerns exist for some users, and the lack of a monolingual dictionary is noted. Requests for improvements include copying kana with romaji and adding furigana on hover. Despite these caveats, sentiment across reviews remains positive.

Pros

Very useful for learning Japanese and expanding vocabulary.
Easy to use and user-friendly with straightforward access.
Strong dictionary features with hover/instant lookup and kanji decomposition.

Cons

Occasional reliability issues; at least one reviewer reports it does not work at all.
Lacks a Japanese monolingual dictionary, which some learners find limiting.
Users request enhancements such as copying Hiragana/Katakana with romaji and showing furigana on hover.

Recent reviews

One of the most useful thing for learning Japanese. My wish is for it to include Japanese to Japanese dictionary. Japanese to English just isn't useful past a certain point.

by Fi***** 2026-08-08

Perfect! This is unbelievably good. I am impressed

by br***** 2026-07-29

View all user reviews ›

Is 10ten Japanese Reader (Rikaichamp) Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

10ten Japanese Reader (Rikaichamp) requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
Critical ******* ****** ** *** ********* ******** **********
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

10ten Japanese Reader (Rikaichamp) is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
Medium **** ********* *** ****** **** ****** ********* ********** *** *** ** ****** ** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
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