How many movies have Keizou Ichikawa and Sayaka Ohara collaborated on?

They have worked on 5 movies together! Their first movie together was Detective Conan: Captured in Her Eyes (2000) while their highest rated movie together was Donten: Laughing Under the Clouds - Gaiden: Chapter 2 - The Tragedy of Fuuma Ninja Tribe (2018). They have not worked together since Donten: Laughing Under the Clouds - Gaiden: Chapter 2 - The Tragedy of Fuuma Ninja Tribe (2018). They are most known for their animation films together.