A big thank you to jpdb.io for permission to use their kanji keywords. All kanji keywords are linked to their respective pages on jpdb and more information can be found at jpdb.io.

The jpdb and RTK keywords are sourced from Jo Liss' heisig-jpdb comparison table, which is distributed under the Apache License 2.0. Modifications have been performed on the original data to include more keywords.

The Kanji stroke diagrams are sourced from KanjiVG data, which is licensed under the Creative Commons Attribution-Share Alike 3.0 license.