How many movies have Hiroaki Takagi and Ikue Otani collaborated on?

They have worked on 4 movies together! Their first movie together was Case Closed: The Crimson Love Letter (2017) while their highest rated movie together was Case Closed: The Million-Dollar Pentagram (2024). They have not worked together since Case Closed: The Million-Dollar Pentagram (2024). They are most known for their action films together.