Kanjikana could be built thanks several external projects.
The kanji and word data comes from JMdict, KANJIDICT, RADKFILE. These files are the property of the Electronic Dictionary Research and Development Group and are used under the Group's license.
The kanji writing animations come from SVG files from AnimCJK, distributed under the Arphic Public License.
To analyze Japanese text, Kanjikana uses Kuromoji, licensed under the Apache License v2.0. Kuromoji itself uses MeCab, an open-source text segmentation library for Japanese text, distributed under the GNU General Public License.