How many movies have Atsushi Nigorikawa and Hideo Ishikawa collaborated on?

They have worked on 3 movies together! Their first movie together was Road to Ninja: Naruto the Movie (2012) while their highest rated movie together was Detective Conan: Episode One - The Great Detective Turned Small (2017). They have not worked together since Case Closed: The Crimson Love Letter (2017). They are most known for their animation films together.