How many movies have Hajime Itō and Yasuo Furuhata collaborated on?

They have worked on 6 movies together! Their first movie together was New Prison Walls of Abashiri 2 (1969) and was their highest rated movie together. They have not worked together since New Abashiri Prison Story: Honor and Humanity, Ammunition That Attracts the Storm (1972). They are most known for their crime films together.