How many movies have Fujiko F. Fujio and Katsuya Yamamoto collaborated on?

They have worked on 4 movies together! Their first movie together was Doraemon: Nobita and the Steel Troops (1986) while their highest rated movie together was Doraemon: Nobita's Three Visionary Swordsmen (1994). They have not worked together since Doraemon: Nobita's Three Visionary Swordsmen (1994). They are most known for their family films together.