Credits and licences
Kanji Fortress is built on open Japanese-language data. Thank you to the people who make it.
Kanji readings and meanings
From KANJIDIC2, a project of the Electronic Dictionary Research and Development Group (EDRDG), used in line with the group's licence (Creative Commons Attribution-ShareAlike 4.0).
Stroke order and kanji parts
From KanjiVG, copyright Ulrich Apel, under Creative Commons Attribution-ShareAlike 3.0. The stroke-order diagrams, look-alikes and kanji families on this site are derived from it and shared under the same licence.
JLPT levels
The JLPT has not published official kanji or grammar lists since 2010. Kanji levels follow the widely used lists by Jonathan Waller (tanos.co.uk).
Written for Kanji Fortress
The mnemonics, example sentences, grammar explanations and guides were written for the game by Social AI Co., Ltd. If you spot a mistake, write to info@socialai.jp.