How many movies have Tomisaburo Nagashima and Yūnosuke Itō collaborated on?

They have worked on 1 movie together! Their first movie together was Casebooks of Detective Umon: The Incident of the Fawn-Pattern Cloth (1952) and was their highest rated movie together. They have not worked together since Casebooks of Detective Umon: The Incident of the Fawn-Pattern Cloth (1952).