SDN48 will be reuniting for a special, one-night performance at AKB48 Theater.
The concert will take place on August 1. It will commemorate the group's 10th anniversary since debuting.
SDN48 was a sister group of AKB48 which served as its adult counterpart. Its members were all at least 20 years old.
The group formed in July 2009 and disbanded on March 31, 2012.