How many movies have Hajime Koizumi and Sadamasa Nishimoto collaborated on?

They have worked on 5 movies together! Their first movie together was King Kong vs. Godzilla (1962) while their highest rated movie together was Mothra vs. Godzilla (1964). They have not worked together since The War of the Gargantuas (1966). They are most known for their science fiction films together.