Udagawa Katsutarō (born Hideo Udagawa; December 3, 1939 – July 24, 1989) was a sumo wrestler from Tokyo, Japan. He made his professional debut in September 1954 and reached the top division in January 1960. His highest rank was maegashira 3. Upon retirement from active competition he became an elder in the Japan Sumo Association under a series of different names, since he didn't own a toshiyori-kabu of his own. He left the Sumo Association in October 1977.