How many movies have Akiyoshi Sakai and Hisayuki Toriumi collaborated on?

They have worked on 4 movies together! Their first movie together was Space Warriors Baldios (1981) while their highest rated movie together was Area 88 Act I: The Blue Skies of Betrayal (1985). They have not worked together since Area 88 Act III: Burning Mirage (1986). They are most known for their animation films together.