How many movies have Masaaki Kannan and Shinji Matsumoto collaborated on?

They have worked on 4 movies together! Their first movie together was Initial D: Third Stage (2001) while their highest rated movie together was Rurouni Kenshin: New Kyoto Arc: The Chirps of Light (2012). They have not worked together since Why We Live (2016). They are most known for their animation films together.