decorative gauze strap on a hanpi
Rare historical term referring to a decorative gauze strap that hangs from the front left side of the kohimo when tying closed a hanpi (a type of short-sleeved garment). Primarily encountered in texts about Heian-era court clothing.
See also: 忘れ緒
The hanpi no o appears in documents as part of Heian-period court attire.