How many movies have Hitoshi Obuchi and Ichirō Saitō collaborated on?

They have worked on 2 movies together! Their first movie together was The Confusing Journey of Jirocho (1963) while their highest rated movie together was Shinobi no mono 7: Mist Saizo Strikes Back (1966). They have not worked together since Shinobi no mono 7: Mist Saizo Strikes Back (1966).

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