How many movies have Naoko Matsui and Yukio Okano collaborated on?

They have worked on 4 movies together! Their first movie together was Detective Conan: The Time Bombed Skyscraper (1997) while their highest rated movie together was Detective Conan: Captured in Her Eyes (2000). They have not worked together since Detective Conan: Captured in Her Eyes (2000). They are most known for their animation films together.