How many movies have Tomohiro Nishiyama and Tomokazu Seki collaborated on?

They have worked on 4 movies together! Their first movie together was Doraemon: Nobita and the Green Giant Legend (2008) while their highest rated movie together was Doraemon: Nobita and the New Steel Troops: Winged Angels (2011). They have not worked together since Doraemon: Nobita and the New Steel Troops: Winged Angels (2011). They are most known for their family films together.