How many movies have Sasada Aiichirou and Shuichiro Koike collaborated on?

They have worked on 6 movies together! Their first movie together was Elisabeth ~The Rondo of Love and Death~ (2003) while their highest rated movie together was Takarazuka Revue - Rurouni Kenshin - The Romantic Story of a Meiji Swordsman- (2016). They have not worked together since The Poe Clan (Flower Troupe, 2018) (2018). They are most known for their romance films together.