How many movies have Kanagal Prabhakar Shastry and T. R. Narasimharaju collaborated on?

They have worked on 4 movies together! Their first movie together was Dudde Doddappa (1966) while their highest rated movie together was Sri Krishnadevaraya (1970). They have not worked together since Sakshathkara (1971). They are most known for their drama films together.