How many movies have Hiroaki Iwanaga and Yasuko Kobayashi collaborated on?

They have worked on 5 movies together! Their first movie together was Kamen Rider OOO Wonderful: The Shogun and the 21 Core Medals (2011) while their highest rated movie together was Kamen Rider OOO: Final Episode (2012). They have not worked together since Touken Ranbu: The Movie (2019). They are most known for their action films together.