How many movies have Hideo Ishikawa and Kappei Yamaguchi acted in together?

They have worked on 6 movies together! Their first movie together was Grappler Baki: The Ultimate Fighter (1994) while their highest rated movie together was Death Note Relight 1: Visions of a God (2007). They have not worked together since Case Closed: The Crimson Love Letter (2017). They are most known for their animation films together.