How many movies have Satoru Iriyoshi and Tsutomu Nishiyama collaborated on?

They have worked on 4 movies together! Their first movie together was Detective Conan: The Last Wizard of the Century (1999) while their highest rated movie together was Yo-kai Watch: The Movie (2014). They have not worked together since Pokémon the Movie: Volcanion and the Mechanical Marvel (2016). They are most known for their animation films together.