Keizan

Keizan Jōkin 瑩山紹瑾 (1268–1325), also known as Taiso Jōsai Daishi, was the second of the great founders of the Sōtō Zen sect in Japan. While Dōgen Zenji, as founder of Japanese Sōtō, is known as Highest Patriarch (高祖, kōso?), Keizan is often referred to as Taiso (太祖), or Great Patriarch.