Oba Mina is the leader of SKE48's Team KII.
- Joined AKB48 as a Kenkyuusei on September, 2009
- Promoted to Team Unknown on December 8, 2010
- Transferred to Team 4 on June 6, 2011
- Transferred to Team B on August 24, 2012
- Had a Concurrent Position in SKE48's Team KII since April 28, 2013 until February 24, 2014
- Transferred to SKE48's Team KII on February 24, 2014