- dmm.co.jp dc/doujin/
- tokyometro.jp station/line_tozai/index.html
- en.wikipedia.org List of jōyō kanjiJapanese pronunciation: [dʑoːjoːkaꜜɲdʑi], lit. "regular-use kanji") system of representing written Japanese currently consists of 2,136 characters. List of characters.
- facebook.com groups/340317417253425/