kanji approved for use in names registered in the 戸籍(こせき) (koseki, “family register”)

Kanji characters outside of the jōyō kanji and jinmeiyō kanji lists. For example, 攪.

kanji not approved for regular use

"the grass is always greener on the other side": The others' circumstances seem more desirable.

(computing) character whose appearance may depend on a user's environment, or a character which may be absent from a user's environment, i.e. character set incompatibility

A kana-based orthography for Okinawan, invented by Yoshiaki FUNAZU, notably including new hiragana ligatures to suit Okinawan phonology.

a logogram

(computing) character whose appearance may depend on a user's environment, or a character which may be absent from a user's environment, i.e. character set incompatibility

the Old Turkic script

mirror writing