From the BBC:

Japan has formally named its first home-grown sumo grand champion in almost two decades, in a boost to the traditional wrestling sport.
Kisenosato, 30, was promoted to the top-most yokozuna rank after his win in the first tournament of the year.
He is the first Japanese-born wrestler to make it since Wakanohana in 1998. Five wrestlers from American Samoa and Mongolia have made it in the interim.

Read the whole article here.