How many movies have Goro Inagaki and Tomonobu Moriwaki collaborated on?

They have worked on 4 movies together! Their first movie together was Honto ni Atta Kowai Hanashi: Summer Special 2011 (2011) while their highest rated movie together was Honto ni Atta Kowai Hanashi: 2020 Special Edition (2020). They have not worked together since Honto ni Atta Kowai Hanashi: 25 Shuunen Tokubetsu-hen (2024). They are most known for their horror films together.