How many movies have Kouhei Tanaka and Masahiro Okamura collaborated on?

They have worked on 2 movies together! Their first movie together was Licca the Movie: Licca-chan to Yamaneko Hoshi no Tabi (1994) while their highest rated movie together was Zorori the Naughty Hero: Quest For The Mysterious Treasure (2006). They have not worked together since Zorori the Naughty Hero: Quest For The Mysterious Treasure (2006).