How many movies have Nakamatsu Toshihiro and Yōichi Shiga collaborated on?

They have worked on 8 movies together! Their first movie together was Eizu o buttobase: Momoiro puttsun musume (1987) while their highest rated movie together was Welcome to the Ogenki Clinic: Feel Good All Over Again (1988). They have not worked together since Toyomaru's 'I'll Go Crazy No Matter How Many Times' (1989).