Kikkō 亀甲
Japanese for tortoiseshell; kikkō shibari (亀甲縛り) is a body tie whose rope forms hexagons like the plates of a turtle shell, often named as the best-known Japanese tie.
Kikkō (亀甲) means a tortoise’s shell, and the dictionary Daijisen also uses it for the tortoiseshell shape and a family crest modeled on it. Shibari Study and Rope365 describe kikkō shibari as a pattern of hexagons on the body, and Japanese Wikipedia calls it the most widely known way of tying, sometimes tied as decoration without binding the wrists. The boundary with hishi is disputed. Japanese Wikipedia reserves kikkō for hexagons and hishi for diamonds, while English Wikipedia notes that many modern sources apply kikkō to any rope body harness. Japanese Wikipedia also links the pattern to tying bulky loads such as rice bales, but flags that claim as lacking a citation.