jadb

An SQLite database containing open source japanese language translation data combined from several sources

• JMDict: https://edrdg.org/jmdict/j_jmdict.html
• RADKFILE/KRADFILE: https://www.edrdg.org/krad/kradinf.html
• KANJIDIC2: https://www.edrdg.org/kanjidic/kanjd2index_legacy.html

Note that while the license for the code is MIT, the data is not.