Hip harness
A rope structure around the hips, used for decoration or as a stable base for suspension; Rope365 gives koshi-nawa as a Japanese name.
Rope365 defines a hip harness simply as a structure around the hips and lists koshi-nawa (腰縄) as a Japanese equivalent; Shibari Study describes koshi nawa as rope around the hips, distinct from dō nawa, which sits higher at the waist. Shibari Study names the hip harness as an example of a load-bearing harness, and notes that hashigata zuri, a face-up bridge-shaped suspension, commonly uses one. A ShibariClasses course presented by London educator Nina Russ argues that apart from decoration a hip harness mainly serves as a solid base for suspension, and therefore has to be built to carry weight, not only to look good.