How many movies have Harumi Okamoto and Takamasa Masuki collaborated on?

They have worked on 4 movies together! Their first movie together was Lupin the Third vs. Detective Conan: The Movie (2013) while their highest rated movie together was Maquia: When the Promised Flower Blooms (2018). They have not worked together since The Girl from the Other Side (2023). They are most known for their animation films together.