How many movies have Chumei Watanabe and Shotaro Ishinomori collaborated on?

They have worked on 3 movies together! Their first movie together was Inazuman Flash (1974) while their highest rated movie together was Kaizoku Sentai Gokaiger vs. Space Sheriff Gavan: The Movie (2012). They have not worked together since Kaizoku Sentai Gokaiger vs. Space Sheriff Gavan: The Movie (2012). They are most known for their science fiction films together.