How many movies have Katsuo Ono and Kumiko Okae collaborated on?

They have worked on 6 movies together! Their first movie together was Destination Station Series - Homicide Assignment (2001) while their highest rated movie together was Murder Credit - Final Destination Series (2016). They have not worked together since Detective Ushio vs. Case Writer Saeko: Last Family (2017). They are most known for their mystery films together.