How many movies have Hannu Kahakorpi and Henrik Otto Donner collaborated on?

They have worked on 3 movies together! Their first movie together was Rottasota (1968) while their highest rated movie together was Mommilan veriteot 1917 (1973). They have not worked together since Mommilan veriteot 1917 (1973). They are most known for their drama films together.