How many movies have Mina Ōba and Rena Kato acted in together?

They have worked on 3 movies together! Their first movie together was AKB48 Request Hour Setlist Best 100 2011 (2011) while their highest rated movie together was Maeda Atsuko's Tearjerking Graduation Announcement in Saitama Super Arena (2012). They have not worked together since Maeda Atsuko's Tearjerking Graduation Announcement in Saitama Super Arena (2012). They are most known for their music films together.