How many movies have Chika Sakamoto and Mayumi Yamaguchi acted in together?

They have worked on 8 movies together! Their first movie together was Digimon Tamers: Battle of Adventurers (2001) while their highest rated movie together was Digimon Adventure: Last Evolution Kizuna (2020). They have not worked together since Digimon Adventure: Last Evolution Kizuna (2020). They are most known for their animation films together.