How many movies have Chika Kojima and Hiroshi Oikawa collaborated on?

They have worked on 2 movies together! Their first movie together was Fafner in the Azure: Dead Aggressor - Heaven and Earth (2010) while their highest rated movie together was Eiga Drive Head: Tomika Hyper Rescue – Kidō Kyūkyū Keisatsu (2018). They have not worked together since Eiga Drive Head: Tomika Hyper Rescue – Kidō Kyūkyū Keisatsu (2018).