How many movies have Koichi Ohta and Yûko Moriyama collaborated on?

They have worked on 3 movies together! Their first movie together was Zëiram (1991) while their highest rated movie together was Moon Over Tao: Makaraga (1997). They have not worked together since Moon Over Tao: Makaraga (1997). They are most known for their science fiction films together.