I would like to thank the Kanji VG project (http://kanjivg.tagaini.net/). I am not associated with Kanji VG, just a user. The kanji (and kana) svg files (i.e. the kanji drawings with stroke order) are used by permission under the following licens:

Licence

KanjiVG is copyright © 2009-2015 Ulrich Apel and released under the Creative Commons Attribution-Share Alike 3.0 license.
https://creativecommons.org/licenses/by-sa/3.0/