Japanese data sources
Attribution
Shukudai keeps Japanese reference datasets as a separate, unmodified layer and surfaces attribution wherever the data is used in-product or exported.
JMdict / JMnedict
Used for dictionary entries, readings, meanings, and name data.
CC BY-SA 4.0
© Electronic Dictionary Research and Development Group (EDRDG).
Distributed in Shukudai's data layer through the jmdict-simplified JSON release.
KANJIDIC2
Used for kanji metadata.
CC BY-SA 4.0
© Electronic Dictionary Research and Development Group (EDRDG).
KanjiVG
Used for kanji stroke data and drawing practice.
CC BY-SA 3.0
© Ulrich Apel.
JLPT N5–N1 vocabulary lists
Used as an unofficial, best-effort JLPT vocabulary signal.
CC BY
Jonathan Waller / tanos.co.uk.
JLPT levels are treated as soft hints, not authoritative placement or content limits.
Tokenizer dictionary
Used through @sglkc/kuromoji for offline tokenization, furigana, and reading checks.
Apache-2.0 for @sglkc/kuromoji
IPADIC is © Nara Institute of Science and Technology.
Notes
CC BY-SA share-alike obligations apply to derivatives of the referenced datasets, not to Shukudai's original code or tutor-authored homework. Shukudai does not fork and edit these datasets into proprietary content.