How many movies have Shōji Sakai and Yumika Hayashi collaborated on?

They have worked on 21 movies together! Their first movie together was Amazon Garden: Uniform Lesbians (1992) while their highest rated movie together was Chikan densha: Iyarashii kôi (1993). They have not worked together since Mahiru no furinzuma: Mio no kairaku (2003).