How many movies have Bunta Sugawara and Nobuaki Nakajima collaborated on?

They have worked on 5 movies together! Their first movie together was Violent Streets (1974) while their highest rated movie together was The Truck Rascals Go to The North (1978). They have not worked together since A 5,000 Kilometer Run under The Scorching Sun (1979). They are most known for their action films together.