NMB48 is a new Japanese girl group from the same company of AKB48, SKE48, and SND48.
NMB stands for Namba, a city in Osaka. There are currently 26 girls in the group and they're still adding members. They have their own Theater in Osaka and perform their daily. Their official debut is unknown for now.
The captain of team N is Sayaka Yamamoto.
Official Website: http://www.nmb48.com/
My favorite is Nana Yamada