How many movies have Hiroshi Hara and Nobuyo Oyama collaborated on?

They have worked on 6 movies together! Their first movie together was Doraemon: Nobita's Dorabian Nights (1991) while their highest rated movie together was Doraemon: Nobita's Three Visionary Swordsmen (1994). They have not worked together since Doraemon: Nobita and the Galaxy Super-express (1996). They are most known for their family films together.