Kannon 観音
Japanese name of the bodhisattva of compassion; in rope, kannon shibari usually stands for the reverse prayer tie, though Japanese usage also gives the name to a spread-leg tie.
Kannon (観音) is the Japanese name of Avalokiteshvara, the Buddhist bodhisattva of compassion (Jisho). Andrea Ropes explains the rope name ushiro-te kannon as hands tied behind the back in imitation of Kannon in prayer, and Rope365 lists ushirote kannon shibari (後手観音縛り) as the reverse prayer tie. SMpedia calls kannon shibari ambiguous: it can be short for 背面観音縛り, the reverse prayer, or, borrowing a term from striptease, mean the spread-leg tie M-ji kaikyaku, whose SMpedia entry indeed lists kannon shibari as an alias. The Japanese school Shibaraku files kannon shibari among its arm ties.