How many movies have Hollow Dragon and Makoto Matsuoka collaborated on?

They have worked on 12 movies together! Their first movie together was Hentai tôkô shashin: Shiin (1996) while their highest rated movie together was Gibo no onanii: Hatsujô roshutsu (1997). They have not worked together since Bakunyû fuzoku: Okini mesumama (2000).