How many movies have Ryoichi Sato and Susumu Ono collaborated on?

They have worked on 5 movies together! Their first movie together was Detective Ushio VS Case Reporter Saeko at the Terminal Station (2008) and was their highest rated movie together. They have not worked together since Detective Ushio vs. Case Writer Saeko: Last Family (2017). They are most known for their mystery films together.