Jōsen 定專, fifth abbot of the Senju-ji 専修寺 (head temple of the Takada 高田 branch of Jōdo Shinshū, in Mie). Active in the early to mid 14th c.; precise lifedates are not securely attested in modern reference works. He succeeded the fourth abbot Junshō 順性 and was succeeded by the sixth abbot. His chief surviving work is the Ji-yō-shū KR6t0383, a doctrinal commonplace-book whose autograph colophon (preserved in 眞慧 Shin’e’s annotation, Enbun 3 / 1358) is the terminus ante quem for his life. The DILA authority id is A001243. He is one of the principal figures in the Senju-ji scholastic line which preserved and developed the Shinran tradition outside the rival Hongan-ji branch.