How many movies have Chumei Watanabe and Hirokazu Iwakami collaborated on?

They have worked on 1 movie together! Their first movie together was Kikai Sentai Zenkaiger vs. Kiramager vs. Senpaiger (2022) and was their highest rated movie together. They have not worked together since Kikai Sentai Zenkaiger vs. Kiramager vs. Senpaiger (2022).