How many movies have Romi Park and Yasuko Kobayashi collaborated on?

They have worked on 9 movies together! Their first movie together was Samurai Sentai Shinkenger vs. Go-Onger: Silver Screen BANG!! (2010) while their highest rated movie together was Attack on Titan: The Roar of Awakening (2018). They have not worked together since Attack on Titan: Chronicle (2020). They are most known for their action films together.