Shozo Saijo (西城 正三, Saijō Shōzō, born January 28, 1947) is a Japanese former professional boxer from Saitama.
Saijo made his professional debut in August, 1964, but did not show immediate promise in the ring, losing or drawing against several lowly regarded fighters.
He traveled to the United States, where he fought three times before meeting WBA featherweight champion Raul Rojas in a non-title match.
He also fought in numerous non-title matches in between his defenses, including a bout against WBA super featherweight champion, Hiroshi Kobayashi, where Saijo lost by decision over 10 rounds.
Saijo disappointed fans by turning his back towards Fujiwara at one point in their match, and he retired from all sports activities shortly afterwards.