Toyonobori, Japanese sumo wrestler (d. 1998)
Michiharu Sadano (定野 道春, Sadano Michiharu, March 21, 1931 – July 1, 1998), known in sumo and professional wrestling as Michiharu Toyonobori (豊登道春, Toyonobori Michiharu) or simply Toyonobori (豊登, Toyonobori), was a sumo wrestler from Japan.

After retiring as a rikishi from sumo, he became a professional wrestler.