Mamoru Watanabe (渡辺 護, Watanabe Mamoru; March 19, 1931 – December 24, 2013) was a Japanese film director, screenwriter and actor, known for his work in the pink film genre. Along with directors Genji Nakamura and Banmei Takahashi, Watanabe was known as one of the "Three Pillars of Pink".
Source: “Mamoru Watanabe”, English Wikipedia (CC BY-SA 4.0), excerpt