How many movies have Keiichi Hasegawa and Mariya Yamada collaborated on?

They have worked on 2 movies together! Their first movie together was Ultraman Tiga & Ultraman Dyna: Warriors of the Star of Light (1998) while their highest rated movie together was Ultraman Mebius & Ultra Brothers (2006). They have not worked together since Ultraman Mebius & Ultra Brothers (2006).