Shintarō Hirase (平瀬 信太郎, Hirase Shintarō, February 28, 1884 – September 9, 1939) was a Japanese malacologist. His father, Yoichirō Hirase, (1859–1925) was also a malacologist. With his father, he collected shells and helped formalize malacology in Japan. Due to their contributions to malacology, numerous species bear the Hirase name, such as Conus hirasei, .