How many movies have Koichi Yamadera and Tomohiro Kawamura collaborated on?

They have worked on 1 movie together! Their first movie together was Eiga Neko Neko Nihonshi: Ryouma no Hachamecha Time Travel ze yo! (2020) and was their highest rated movie together. They have not worked together since Eiga Neko Neko Nihonshi: Ryouma no Hachamecha Time Travel ze yo! (2020).