Mune hishi 胸菱
Japanese for chest diamond; mune hishi gote shibari is an upper-body tie that starts as a tasuki chest harness and adds a hishi diamond while the hands are tied behind the back.
The name pairs mune (胸), the chest, as in mune nawa, with hishi (菱), the diamond. Shibari Study writes the full name as mune hishi gote shibari (胸菱後手縛り) and defines it as a pattern that begins as a tasuki chest harness (its tasuki entry describes rope crossing the chest or shoulders), then adds a diamond and becomes a gote, a tie with the hands behind the back. SHIBAKU’s glossary gives the same outline: the tie starts as a tasuki shibari and ends as a takate kote or gote shibari decorated with a diamond. Both definitions come from practitioner glossaries.