10ten Japanese Reader (Rikaichamp) by Birchill

Look up Japanese words with the hover of a mouse.

After enabling the add-on from the toolbar (or press Alt+R) simply hover over Japanese text and a popup displays corresponding dictionary definitions.

Use Shift/Enter to cycle through the available dictionaries (word dictionary, kanji dictionary, names dictionary), and 'd' to toggle hiding the definitions. You can use 'c' to select entries to copy.

Features:

• Pitch accent information
• Support for non-English dictionaries
• Dictionaries that update automatically every week by fetching just the updated 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 etc.)
• Recognition of a wide range of grammatical forms (e.g. 兼した, 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
• 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.

10ten Japanese Reader aims to be simple, reliable, fast, and always up-to-date.

Twitter: @10tenstudy