How many movies have Jules Verne and Katsuhiro Nanba collaborated on?

They have worked on 3 movies together! Their first movie together was Fifteen Boys Adrift (1982) while their highest rated movie together was Round Vernian Vifam: 12 Fade Away (1985). They have not worked together since Round Vernian Vifam: Memory of Ms. Kate (1985). They are most known for their animation films together.