How many movies have Ken Iizuka and Kōshi Akaike collaborated on?

They have worked on 1 movie together! Their first movie together was Legend of the Flowing Kunoichi Amakusa Shiro Stories ~Demon Sword Evening~ (2002) and was their highest rated movie together. They have not worked together since Legend of the Flowing Kunoichi Amakusa Shiro Stories ~Demon Sword Evening~ (2002).