How many movies have Hiroaki Ito and Hiroyuki Mitsui collaborated on?

They have worked on 1 movie together! Their first movie together was Kyō Kara Ore Wa!! Guts Daze 17 Sai (1997) and was their highest rated movie together. They have not worked together since Kyō Kara Ore Wa!! Guts Daze 17 Sai (1997).