Chōgorō Kaionji(海音寺潮五郎Kaionji Chōgorō, =November 5, 1901 - December 1, 1977) was the pen-name of Tosaku Suetomi(末富 東作Suetomi Tosaku), a Japanese author. Noted for his historical fiction novels, he was active during the Shōwa period of Japan.