How many movies have Kohei Tanaka and Oji Hiroi collaborated on?

They have worked on 3 movies together! Their first movie together was Far East of Eden: Ziria's Dreamlike Chapter (1990) while their highest rated movie together was Sakura Wars: The Movie (2001). They have not worked together since Sakura Taisen Kayou Show Final Kouen 『Shin Ai Yueni』 (2006). They are most known for their animation films together.