How many movies have Shirō Sano and Takeshi Yagi collaborated on?

They have worked on 2 movies together! Their first movie together was Arthouse Ultraman (2005) while their highest rated movie together was Bringing Godzilla Down to Size: The Art of Japanese Special Effects (2008). They have not worked together since Bringing Godzilla Down to Size: The Art of Japanese Special Effects (2008).