Lingua Mundi
One engine, two ways to use it: Shikibu, the EPUB editor for reading and annotating Japanese books, and the Lingua Mundi API — a dictionary and linguistic-data service built on JMdict, WordNet, KANJIDIC2, and J-UniMorph. Every lookup traces to source data, never a guess.
EPUB editor · Android APK + desktop app
Open a Japanese EPUB, add furigana in one click, annotate vocabulary and grammar, run linguistic searches across the whole book, and export a clean, spec-compliant EPUB. Pro adds a full offline dictionary powered by the Lingua Mundi database.
Dictionary & linguistic data over one simple API
Look up words, furigana, deinflections, senses, kanji data, and inflection paradigms through a simple HTTP API. Start free; Pro ($9/mo) adds API keys and higher limits.
Companion EPUB reader/annotator
The Shikibu EPUB editor as an Android companion app — open, annotate, and add furigana to Japanese EPUBs on your phone. Install the APK directly.
Lingua Mundi GUI — online & offline
Look up Japanese words in the interactive dictionary: type a word, get furigana, senses, readings, and kanji details — straight from the Lingua Mundi database. Works online, or bundled with your own copy of the database.
Shikibu runs on Windows, Linux, and Android. The desktop installers below are self-contained: no account, no server, no data leaves your machine.
New to Shikibu? Read the beginner's guide to open your first Japanese book — about five minutes, no technical background needed.
How one researcher built a six-language map of meaning from open lexical data on a 2014 laptop — the full project history, technical account, and the infrastructure bug that hid the word cat.
An audiobook edition (.m4b) and chapter downloads are on the paper page.
Questions or feedback: rhls.softdev@gmail.com