Tosanoumi Toshio, is a former sumo wrestler. He first reached the top division of professional sumo in 1995, winning 13 special prizes and earning 11 kinboshi or gold stars for defeating yokozuna over his long career. The highest rank he reached was sekiwake. He retired in 2010 to become a coach at his stable, Isenoumi stable under the name of Tatekawa.

In 1996, the Kyushu Grand Sumo Tournament set a record for the number of wrestlers in a playoff, after Musashimaru, Akebono, Wakanohana, Takanonami, and Kaio, all tied at 11–4. Musashimaru won the historic five-way playoff, taking his second tournament title since July 1994.