AKB48 is a Japanese idol group based in Akihabara, Tokyo, where they have their own theater in Don Quixote. The group, established in 2005, is produced by Akimoto Yasushi and is signed under King Records, originally from DefSTAR RECORDS/Sony Music Japan. Currently the group consists of four teams: Team A, Team K, Team B and Team 4. There is also a trainee team, Research Students, and an international transference team, Team Kaigai. They hold the record for highest overall single sales for a female group on the Oricon charts and also hold the Guinness World Record for world's "largest pop group".