How many movies have Hirofumi Shiraishi and Yuka Okamoto collaborated on?

They have worked on 3 movies together! Their first movie together was Moldiver (1993) while their highest rated movie together was Yu Yu Hakusho: Poltergeist Report (1994). They have not worked together since Yu Yu Hakusho: Poltergeist Report (1994). They are most known for their animation films together.