How many movies have Hideki Tajima and Shuichi Oshima collaborated on?

They have worked on 6 movies together! Their first movie together was Kamen Rider Zi-O the Movie: Over Quartzer (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 Geats × Revice: Movie Battle Royale (2022). They are most known for their science fiction films together.