How many movies have Arata Saeki and Teruaki Sugihara collaborated on?

They have worked on 2 movies together! Their first movie together was Kamen Rider Reiwa: The First Generation (2019) while their highest rated movie together was Kamen Rider Zero-One The Movie: REAL×TIME (2020). They have not worked together since Kamen Rider Zero-One The Movie: REAL×TIME (2020).