Ryōji Minagawa(皆川 亮二Minagawa Ryōji, born July 5, 1964) is a Japanese manga artist born in Sumida, Tokyo. He was invited with Spriggan story writer Hiroshi Takashige to go to a comic convention in Portugal in 1996 as a guest of honor due to his work on Spriggan. He worked on other manga comics before he went on to create Project ARMS with fellow manga artist, Kyoichi Nanatsuki. His first name is sometimes transliterated as Ryouji.