How many movies have Lee Kang-jo and Sang-gi Han collaborated on?

They have worked on 3 movies together! Their first movie together was Long Live the Island Frogs (1972) while their highest rated movie together was Special Investigation Unit: The Life of Miss Kim Su-im (1974). They have not worked together since Special Investigation Unit: The Life of Miss Kim Su-im (1974). They are most known for their drama films together.