How many movies have Kazuhiko Yukawa and Sei Hiraizumi collaborated on?

They have worked on 2 movies together! Their first movie together was 女王の教室スペシャル エピソード2 ~悪魔降臨~ (2006) while their highest rated movie together was Overprotected Kahoko: 2018 Love & Dream (2018). They have not worked together since Overprotected Kahoko: 2018 Love & Dream (2018).