How many movies have Hiroshi Hara and Kenzo Koizumi collaborated on?

They have worked on 5 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's Diary on the Creation of the World (1995). They are most known for their family films together.