How many movies have Gackt and Keiichi Sano collaborated on?

They have worked on 1 movie together! Their first movie together was MALICE MIZER: merveilles ~Shuuen to Kisuu~ l'espace (1998) and was their highest rated movie together. They have not worked together since MALICE MIZER: merveilles ~Shuuen to Kisuu~ l'espace (1998).