Agura 胡座
Japanese for sitting cross-legged; agura shibari is a tie that holds the legs in a crossed position.
Agura is the everyday Japanese word for sitting with the knees spread and the legs crossed in front, written 胡坐 or 胡座. Shibari Study and Rope365 both list agura shibari (胡座縛り) as a tie that binds crossed legs, and Rope365 gives the English name cross-legged pose. The posture also appears in older Japanese restraint: the dictionary Daijisen describes the Edo-period torture ebi-zeme as starting with the prisoner seated cross-legged before being bent forward. English Wikipedia mentions a related tie, spelled agoura, as a milder relative of the ebi.