English → Japanese
English to Japanese, built by pivoting Princeton WordNet 3.0 through the Japanese wordnet in the Open Multilingual Wordnet.
Download
en-ja.zip 15.4 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/en-ja/en-ja.ifo
Restart KOReader. This dictionary includes an inflection index, so looking a word up exactly as it appears in a book works.
Coverage
How many of the most common words in the source language this dictionary can actually resolve, counting words reached through the inflection index.
| Frequency band | Found | As headword | Via inflection | Coverage |
|---|---|---|---|---|
| top 1,000 | 983 | 896 | 87 | 98.3% |
| top 5,000 | 4,841 | 4,073 | 768 | 96.82% |
| top 10,000 | 9,366 | 7,507 | 1,859 | 93.66% |
| top 50,000 | 38,162 | 27,141 | 11,021 | 76.32% |
Measured against OpenSubtitles 2018 English top 50k (hermitdave/FrequencyWords).
What is in an entry
| Entries with a real translation | 98,854 (60.61%) |
| Entries with only a definition, no translation | 64,248 |
| Entries with a usage example | 34,218 (20.98%) |
| Entries with inflected forms | 159,806 (97.98%) |
| Entries with pronunciation | 22,504 |
| Senses | 252,307 |
| Mean definition length | 46.1 characters |
| Mean translations per entry | 1.92 |
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
| Source | Licence | Credit |
|---|---|---|
omw-ja | WordNet-3.0 | Japanese Wordnet, via Open Multilingual Wordnet 1.4 |
pwn30 | WordNet-3.0 | Princeton University WordNet 3.0 |
wikt-en-ja | CC-BY-SA-4.0 | English 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.