How many movies have Shōji Sakai and Tatsuo Kobayashi collaborated on?

They have worked on 2 movies together! Their first movie together was Oshiego to Kyôshi: Itazura Hime Hajime (2003) and was their highest rated movie together. They have not worked together since Deai Keifurin: Ochita Hitozumatachi (2004).