How many movies have Keiichi Hasegawa and Risa Saito collaborated on?

They have worked on 6 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 Saga (2012). They have not worked together since Ultraman Saga (2012). They are most known for their adventure films together.