Masaharu Sekiguchi
Masaharu Sekiguchi
Born: June 26, 1970
Occupation: Actor
Years active: 1990 - present
Spouse: N/A
Website: N/A

Masaharu Sekiguchi (関口正晴 Sekiguchi Masaharu?) is a Japanese actor. He is noted for his role as Katsuto Asahi, the human form of Ultraman Zearth in the same name film and Ultraman Zearth 2: Superhuman Big Battle - Light and Shadow. He was also the voice actor of Ultraman Zearth.