Hayato Terahara (寺原 隼人, Terahara Hayato, born October 9, 1983) is a former Japanese professional baseball pitcher. He played for the Fukuoka Daiei Hawks/Fukuoka SoftBank Hawks , Yokohama BayStars, Orix Buffaloes and Tokyo Yakult Swallows of the Nippon Professional Baseball(NPB). On September 17, 2019, Terahara announced his retirement. On October 31 2022, The Fukuoka SoftBank Hawks announced that Terahara will take over as pitching coach from the 2023 season