The term 'Sash in Sapporo' is a reference to the traditional Japanese OBI sash, which is worn around the waist of a kimono. The OBI is typically made of silk and is often decorated with intricate patterns and designs. The crossword solution for this term is OBI, which is an abbreviation for the Japanese word for sash. This traditional garment is still worn today in Japan, especially during special occasions such as weddings and festivals.