Nishinoumi Kajirō I

was a Japanese professional sumo wrestler from Sendai, Satsuma Province. He was the sport's 16th yokozuna, and the first to be officially listed as such on the banzuke ranking sheets, an act which strengthened the prestige of yokozuna as the highest level of achievement in professional sumo.

Early career His real name was . He began his career in Kyoto sumo, joining Tokinokoe stable in 1873. He was promoted to the top makuuchi division in 1879, and made sekiwake in September 1879, a tournament which was held under the joint auspices of the Kyoto and Osaka sumo organisations. Nishinoumi fell to sekiwake in January 1886, despite recording a kachi-koshi winning score, as at the time a sekiwake on the east side of the banzuke with a better record could overtake an ōzeki on the same side. Championships for the best record in a tournament were not recognized or awarded before the 1909 summer tournament and the above unofficial championships are historically conferred. For more information see yūshō.