The major singles have title tracks that are sung by a selection of the AKB48 singers, some of whom are from AKB48's sister groups.
Other singles have line-ups that are determined by rock-paper-scissors tournaments that are held annually.
They released 2 compilation albums before released their debut album titled Koko ni Ita Koto.
[1][2] On New Year's Day of 2013, AKB48 released the Studio Recordings Collection.
Each 2-disc album includes extra songs and karaoke tracks not on previous versions.