How many movies have Keiichi Hasegawa and Kiyoshi Ishii collaborated on?

They have worked on 1 movie together! Their first movie together was Kamen Rider Drive Saga: Kamen Rider Mach / Kamen Rider Heart (2016) and was their highest rated movie together. They have not worked together since Kamen Rider Drive Saga: Kamen Rider Mach / Kamen Rider Heart (2016).