How many movies have Kunihiro Kawamoto and Naoki Osada collaborated on?

They have worked on 2 movies together! Their first movie together was Heisei Rider vs. Showa Rider: Kamen Rider Wars feat. Super Sentai (2014) while their highest rated movie together was Super Hero Wars GP: Kamen Rider #3 (2015). They have not worked together since Super Hero Wars GP: Kamen Rider #3 (2015).