STU48

STU48 (Setouchi48) is a Japanese idol group and sister group of AKB48. It is named after the Setouchi Region and is the first member of AKB48 Group to have a shipboard theater (船上劇場, senjou gekijou). The group is co-owned by the tourism board of Setouchi Region and is highly involved in their promotional efforts. (Source: Wikipedia)