Kubinawa 首縄
Japanese for neck rope; kubinawa names rope placed around the neck, which SMpedia warns is very dangerous, while some schools use a loose rope collar as a communication exercise.
Kubinawa (首縄) joins kubi, neck, and nawa, rope; Jisho lists it as a rare word for a leash or lead. SMpedia treats it as a position word for any technique that puts rope on the neck and warns that this is very dangerous and should not be used. The word appears in older kinbaku print, for example a 1962 Kitan Club piece by Tsukamoto Tetsuzō on photographing kubinawa and gote shibari (Nawapedia, SMpedia), and Japanese Wikipedia mentions a neck rope as part of a one-arm tie. Kinbakuwiki, after Harukumo, describes a different use in the Yukimura-ryū and Osada-ryū: a loose rope collar, wide enough to turn freely around the neck and held by its tail as a nawajiri exercise in communication.