How many movies have Hikaru Takanashi and Ikue Otani collaborated on?

They have worked on 4 movies together! Their first movie together was Detective Conan: Private Eye in the Distant Sea (2013) while their highest rated movie together was Detective Conan: Dimensional Sniper (2014). They have not worked together since Case Closed: The Crimson Love Letter (2017). They are most known for their animation films together.