How many movies have Kenji Nagai and Ryuichi Takano collaborated on?

They have worked on 8 movies together! Their first movie together was Kaiki Senyaichiya Monogatari: Sen no Maki (1991) while their highest rated movie together was Mikadroid: Robokill Beneath Disco Club Layla (1991). They have not worked together since Kaiki Senyaichiya Monogatari: Yoru no Maki (1991). They are most known for their horror films together.