NMB48 (read "N.M.B. Forty-eight") is a Japanese idol girl group that debuted in 2011 as the second sister group to AKB48, produced by Yasushi Akimoto. The group performs at the NMB48 Theater which is located in the basement of the Yes-Namba Building in Namba, Osaka. The name "NMB" comes from "Namba" in the Minami district in Osaka.