How many movies have Soichiro Matsuda and Tsutomu Suzuki collaborated on?

They have worked on 6 movies together! Their first movie together was Slayers Gorgeous (1998) while their highest rated movie together was One Piece: Baron Omatsuri and the Secret Island (2005). They have not worked together since Doraemon: Nobita's Treasure Island (2018). They are most known for their animation films together.