How many movies have Haruna Kojima and Yasushi Akimoto collaborated on?

They have worked on 12 movies together! Their first movie together was The Suicide Song (2007) while their highest rated movie together was Maeda Atsuko's Tearjerking Graduation Announcement in Saitama Super Arena (2012). They have not worked together since Minegishi Minami Graduation Concert ~Sakura no Sakanai Haru wa Nai~ (2021). They are most known for their music films together.