Ōnaruto Nadaemon

was a Japanese professional sumo wrestler from Tsuna, Hyōgo Prefecture (now Awaji, Hyōgo). His highest rank was ōzeki. He is the second wrestler from Hyōgo Prefecture to have reached this rank, being the first promoted since Iwamigata's promotion in 1821, 69 years earlier.

History Little is known about Ōzora before he became a professional wrestler. He first tried his luck by becoming a wrestler with the Osaka-based Sumo Association and joined under the instructions of , the first yokozuna from Osaka-sumo promoted by the of Kyoto. There, he first took the shikona, or ring name.

Eventually he decided to leave Osaka to become a wrestler with the Tokyo-based Sumo Association in January 1879, and joined Ikazuchi stable led by Umegatani, who was still an active wrestler at the rank of ōzeki. He was quickly promoted to the makuuchi division, just one year after joining the stable. After his first promotion to the rank of sekiwake, he changed his shikona to , to evoke the whirlpools of his native island, which also gave the name "Ōnaruto" to the bridge that now crosses the Naruto Strait. Ōnaruto later changed his wrestler's first name to "Nadaemon" to evoke the of the Edo era.