How many movies have Hiroyuki Kawasaki and Mankichi Maeda collaborated on?

They have worked on 7 movies together! Their first movie together was 隠密くノ一忍法帳 餓鬼姉妹 (2005) while their highest rated movie together was Lady Ninja Kaede (2007). They have not worked together since Genkai Eros Kyoten: Shuten-Doji (2012). They are most known for their action films together.