Ōnokuni Yasushi (Japanese: 大乃国 康, born October 9, 1962 as Yasushi Aoki (青木 康)) is a Japanese former professional sumo wrestler from Hokkaidō. Making his professional debut in 1978, he reached the top division in 1983. In 1987 he won his first yūshō or tournament championship with a perfect record and became the sport's 62nd yokozuna. However, he was only able to win one more championship before his retirement in 1991. He has remained in sumo as a coach and in 1999 became the head of Shibatayama stable. He was elected to the Japan Sumo Association's board of directors in 2018.