How many movies have Teiichi Saitô and Tsutomu Kitagawa collaborated on?

They have worked on 3 movies together! Their first movie together was Godzilla 2000: Millennium (1999) while their highest rated movie together was Godzilla: Tokyo S.O.S. (2003). They have not worked together since Godzilla: Final Wars (2004). They are most known for their adventure films together.