How many movies have Kenji Kawai and Maki Ohguro collaborated on?

They have worked on 1 movie together! Their first movie together was Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders (2017) and was their highest rated movie together. They have not worked together since Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders (2017).