seemingly not part of the same group, but actually indeed comrades

hentaigana for old names supported by resident registrations in Japan

a kana ligature

biscriptal kanji-kana text

the Tangut script (a logographic writing system used for writing the Tangut language of the Western Xia Dynasty)

Cyrillization (putting text into the Cyrillic alphabet)

the Old Turkic script

(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

(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.