noun
decorative gauze strap on hanpi
Historical clothing term: a decorative gauze strap hanging from the front left side of the kohimo when tying closed a hanpi (a type of ancient Japanese garment). Rare outside of historical or costume contexts.
See also: 小紐
古代の装束では、忘れ緒が左前に垂れるように結ばれた。
In ancient court attire, the wasureo was tied so that it hung down on the left front.
小紐 (kohimo) is the thin cord used to tie the hanpi; 忘れ緒 is the decorative strap attached to it.
The exact derivation is uncertain; the kanji 忘れ (forget) and 緒 (cord) may reflect a traditional name for this ornamental strap.