How many movies have Ken Baba and Yuuko Sobu collaborated on?

They have worked on 3 movies together! Their first movie together was Lupin the Third: Farewell to Nostradamus (1995) while their highest rated movie together was Go! Anpanman: Tears of the Mermaid Princess (2000). They have not worked together since WXIII: Patlabor The Movie 3 (2002). They are most known for their animation films together.