How many movies have Hayashiya Shōzō IX and Hiroaki Serizawa collaborated on?

They have worked on 4 movies together! Their first movie together was Touch: The Ace Without a Number (1986) while their highest rated movie together was Touch 3: Don't Pass Me By (1987). They have not worked together since Touch: Miss Lonely Yesterday (1998). They are most known for their animation films together.