10ten Japanese Reader

Hi fellow Japanese reader! Formerly known as Rikaichamp, this browser extension lets you look up Japanese words with the hover of a mouse or tap of a screen.

Installing
Features
Usage
Building from source
Contributing
Contributors

Installing

Features

Pitch accent information
Support for non-English dictionaries
Dictionaries that update automatically twice a week by fetching just the updated entries
Easy to read dictionary entries
Automatic translation of Japanese-era years into Gregorian years (e.g. 昭和５６年、令和元年、平成三十一年)
Automatic translation between 畳/帖 measurements and square meters (e.g. 四畳半、12.6 帖、25 平米、6m²)
Recognition of a wide range of grammatical forms (e.g. irregular inflections of する-verbs like 罰せられる, irregular verbs like いらっしゃいます, continuous forms like 食べてた, ん as a negative form like 分からん、知らん, words with ー like じーちゃん、頑張ろー、そーゆー, ぬ verbs, とく・どく forms like 買っとく, causative passive, させる for verbs ending in す e.g. 起こさせる)
Automatic preview of name entries when there is a better match in the name dictionary
Handling of a wide range of characters including ㋕, ㌀, ㋿, 𠏹沢, ８月, Ｂ級グルメ, オーサカ
Localized into Japanese (so you can study Japanese while you study Japanese!) and Simplified Chinese
Prioritization of common matches
Support for displaying romaji
Copy feature that allows selecting which entry and in what format to copy to the clipboard
Smart popup positioning
Support for vertical text and text in SVG images
Minimal memory usage
Kanji data for Kanji kentei, Conning references, updated educational levels, heavily reworked kanji components etc.
Intuitive settings window
Isolation of styles so that the popup always looks correct
Handling of ruby text in YouTube

Usage

By default, you can enable the 10ten Japanese Reader by either:

Pressing the toolbar button (you may need to add it to the browser toolbar yourself in some browsers)
Pressing Alt+R
Choosing to enable it from the context menu

Alternatively, a lot of users find it helpful to have the extension permanently enabled but configured to only show the pop-up when either Alt or Ctrl is pressed.

The other keys are as follows:

Action	Key
Switch dictionary (words → kanji → names)	`Shift` / `Enter`
Show kanji results only	`Shift` (disabled by default)
Toggle display of definitions	`d` (disabled by default)
Move the popup up or down	`j` / `k` (disabled by default)
Enter copy mode	`c`
(Copy mode) Copy entry	`e`
(Copy mode) Copy tab-separated fields	`y`
(Copy mode) Copy word/kanji	`w`
(Copy mode) Select next entry	`c`

Building a release from source

You may also build the add-ons using a source package from the Releases page and running the following commands:

export RELEASE_BUILD=1
pnpm install
pnpm package:firefox
# Or `yarn package:firefox` for versions 0.20.0 and earlier
# Or `yarn package` for versions 0.5.8 and earlier

(Note that you may ignore the .js files associated with each release. These are published simply to provide a public URL for each version of the source files to associating stack traces from error reports.)

The above builds the package for Firefox. Use pnpm package:chrome to build the Chrome package, pnpm package:edge for Edge, pnpm package:safari for Safari, or pnpm package:thunderbird for Thunderbird.

Note: For versions prior to and including 0.5.5 pnpm install will try to install husky but fail so you will need to run pnpm install --ignore-scripts.

To build the latest trunk version please see CONTRIBUTING.md.

Contributing

Please see CONTRIBUTING.md.

Contributors

Thank you to everyone who has contributed including the following people (emoji key):

_SaltfishAmi 💻 🌍	_{Claudio Freitas} 💻	_Kala-J 💻 🔣	_ispedals 💻	_{YUKI "Piro" Hiroshi} 🌍	_kikaxa 💻	_{Edho Arief} 💻
_{Erek Speed} 💻	_{Jamie Birch} 💻 🤔 🐛 📦	_{Martin Böhm} 🐛 🤔	_nicolasmaia 🐛 🤔	_{Jack Arrington} 💻 📖	_Eneas 💻	_{Phong Phan} 💻
_{Mai Lavelle} 💻