How many movies have Nobuhiko Obayashi and Yoichi Takabayashi collaborated on?

They have worked on 3 movies together! Their first movie together was Death at an Old Mansion (1975) while their highest rated movie together was The Adventures of Kosuke Kindaichi (1979). They have not worked together since The Little Girl Who Conquered Time (1983). They are most known for their mystery films together.