Data Sources
Data Sources
Kanji Flash uses prepared kanji data from named source projects, then adds a learning layer on top. The site does not claim to own the base dictionary data.
The current public data includes 4 groups, 12 Sets, 114 Decks, 2,681 Cards, 4,875 Deck memberships, 16,086 useful-word items, and 16,086 related-kanji links.
1. Kanji.Jepang.org and kanji-data
Kanji Flash uses kanji data prepared for the Jepang.org kanji ecosystem, including the sepTN/kanji-data package.
This is the closest direct source for the kanji facts used by Kanji Flash.
2. kanjiapi.dev
kanjiapi.dev provides JSON kanji data for more than 13,000 kanji. The kanji-data package is based on this data.
kanjiapi.dev code is published under the MIT license, but the dictionary data it uses has its own source and license requirements.
3. EDRDG Dictionary Files
The underlying dictionary data comes from EDRDG files, including JMdict, EDICT, KANJIDIC, KANJIDIC2, and related files.
These files are owned by the Electronic Dictionary Research and Development Group and are made available under the Creative Commons Attribution-ShareAlike 4.0 license. Read the EDRDG license. The files are provided without warranty.
4. JLPT Data
JLPT level information comes through the kanjiapi.dev and kanji-data chain from Jonathan Waller's JLPT Resources.
JLPT labels on Kanji Flash are study guidance, not an official guarantee from the JLPT organization.
5. What Kanji Flash Adds
Kanji Flash adds the learning structure: Archive selection, Sets, Decks, Card membership, practice screens, localized copy, useful words, related kanji, and short learning explanations.
Those additions are for study navigation. They are not official kanji classifications and should not be used as the only source for formal work.
6. Related Pages
For content rules, read the Editorial Policy. For limits of use, read the Disclaimer. To report a data issue, use Corrections or Contact.