hip vent
A clothing cutout in the hip area of a garment, like those found at the sides of the waistband of a hakama. Present in highly exaggerated form in the costumes of Ibuki, Akashi, and Ooyodo.
If the cutout goes all the way down to the hem, use side slit (and possibly also pelvic curtain) instead.
Examples
See also
The following tags are aliased to this tag: hip_cutout (learn more).