This is a magic belt for Awa Odori dancing, purchased from Okatyu. I've worn it about twice. From the Okatyu website: This magic tape style can be attached to any part of the fabric, is stretchy, and holds firmly. It prevents the costume from slipping even during vigorous dancing, and is a favorite of famous dance groups. Because it's stretchy, it can be used comfortably by people with a waist size of around 110cm. Width: Approximately 3.5cm Retail Price: 1100 yen