Seodang Third-Party Notices

Last updated: June 8, 2026

Seodang uses open-source and public learning data to provide kanji metadata, stroke order, category mapping, and writing-practice references.

KANJIDIC2

• Purpose: kanji metadata, readings, meanings, grade information
• License: Creative Commons Attribution-ShareAlike 4.0
• Source: EDRDG KANJIDIC Project
• License details: EDRDG licence statement

KanjiVG

• Purpose: kanji stroke order and SVG path data
• License: Creative Commons Attribution-ShareAlike 3.0
• Source: KanjiVG
• License details: CC BY-SA 3.0

AnimCJK

• Purpose: supplemental stroke data for characters not covered by KanjiVG
• License: Arphic Public License for kanji/hanzi SVG files
• Source: AnimCJK
• License details: Arphic Public License

JLPT Kanji Category Data

• Purpose: JLPT category mapping
• License: open-source JLPT kanji JSON source used by the data pipeline
• Source: kanjiapi.dev
• Related repository: onlyskin/kanjiapi.dev