Kinbiken 緊美研
Short name of the Kinbaku-bi Kenkyūkai, the rope study group formed around Nureki Chimuo in 1985–86, which held monthly sessions, issued a bulletin and made instructional videos.
Kinbiken abbreviates Kinbaku-bi Kenkyūkai (緊縛美研究会), roughly “society for the study of the beauty of bondage,” the group around Nureki Chimuo. The historian Kawahara Azumi traces it to a small gathering of rope enthusiasts on October 27, 1985, which took the Kinbiken name at its third meeting in February 1986, with the photographer Fuji Akio handling its administration. It then met monthly and published Kinbiken Tsūshin from 1989 to 1999; Nawapedia also records a series of Kinbiken instructional videos.
Kawahara writes that the group ran on Nureki’s conviction that rope should not be a mere aid to sex, and that members were strictly forbidden to touch models uninvited. Shibari Dojo describes the meetings as intimate rope salons, kept apart from stage shows, where Naka Akira spent years watching and assisting.