How many movies have Masato Hironishi and Yuka Tachihara collaborated on?

They have worked on 1 movie together! Their first movie together was Tachihara Yuka & Takaki Yōko: yōjoku kōsaku toraianguru burū (1988) and was their highest rated movie together. They have not worked together since Tachihara Yuka & Takaki Yōko: yōjoku kōsaku toraianguru burū (1988).