How many movies have Kazuhiro Wakabayashi and Yumiko Katayama collaborated on?

They have worked on 4 movies together! Their first movie together was Jin-Roh: The Wolf Brigade (1999) while their highest rated movie together was Ghost in the Shell: Stand Alone Complex - Solid State Society (2006). They have not worked together since Eden of the East Movie II: Paradise Lost (2010). They are most known for their science fiction films together.