KOReader Dicts

All dictionaries

Japanese English

Japanese to English, generated by inverting the WordNet pivot and enriched with the Japanese section of the English Wiktionary and the Japanese edition's own translation tables. Includes an inflection index.

155,255
entries
395,693
inflected forms
81.92%
with a translation
top-10k coverage

Download

ja-en.zip 14.5 MB · StarDict · CC-BY-SA-4.0

Install on your e-reader

Unzip and copy the folder onto your device so that you end up with:

koreader/data/dict/ja-en/ja-en.ifo

Restart KOReader. This dictionary includes an inflection index, so looking a word up exactly as it appears in a book works.

Full instructions for every device · KOReader wiki

Coverage

How many of the most common words in the source language this dictionary can actually resolve, counting words reached through the inflection index.

No frequency list was configured for this pair.

What is in an entry

Entries with a real translation127,184 (81.92%)
Entries with only a definition, no translation28,071
Entries with a usage example50,513 (32.54%)
Entries with inflected forms59,626 (38.41%)
Entries with pronunciation56,934
Senses312,789
Mean definition length41.9 characters
Mean translations per entry3.24

An entry counted as “definition only” is one where the source wordnet knows the concept but has no word for it in the target language. These are shipped because a definition still helps a reader, and counted separately because calling them translations would be dishonest.

Sources and licence

SourceLicenceCredit
omw-jaWordNet-3.0Japanese Wordnet, via Open Multilingual Wordnet 1.4
pwn30WordNet-3.0Princeton University WordNet 3.0
wikt-ja-defCC-BY-SA-4.0Japanese Wiktionary via kaikki.org (wiktextract)
wikt-ja-enCC-BY-SA-4.0English Wiktionary (Japanese entries) via kaikki.org (wiktextract)
wikt-ja-to-enCC-BY-SA-4.0Japanese Wiktionary via kaikki.org (wiktextract)

Bundled under CC-BY-SA-4.0, the least restrictive licence that covers every source above. Each source’s own terms are reproduced in the ATTRIBUTION file inside the download.