How many movies have Takahito Katayama and Yuko Yamada collaborated on?

They have worked on 3 movies together! Their first movie together was Rurouni Kenshin: New Kyoto Arc: Cage of Flames (2011) while their highest rated movie together was Rurouni Kenshin: New Kyoto Arc: The Chirps of Light (2012). They have not worked together since Ghost in the Shell: The New Movie (2015). They are most known for their animation films together.