The term 'Kimono Waist-Cincher' is a traditional Japanese garment accessory. It is also known as an OBI, which is a three-letter word. An OBI is a sash or belt that is worn around the waist of a kimono to give it shape and definition. It is usually made from a stiff fabric and is often decorated with intricate patterns and designs. The OBI is an important part of the traditional Japanese dress and is still worn today.