How many movies have Keiju Nagasawa and Mitsunori Hattori collaborated on?

They have worked on 3 movies together! Their first movie together was Kaiki Senyaichiya Monogatari: !! no Maki (1991) while their highest rated movie together was Bloody! Scary Horror! (1992). They have not worked together since Bloody! Scary Horror! (1992). They are most known for their horror films together.