Promotion-chasing sekiwake Tochiozan stunned overnight co-leader Kisenosato on Thursday to maintain his perfect start with a fifth win at the Autumn Grand Sumo Tournament.
Tochiozan, who beat two yokozuna en route to a 10-5 mark at the last meet in Nagoya, got inside Kisenosato and surged forward to barge the ozeki over the straw bales at Ryogoku Kokugikan.
Idle on Wednesday after posting a default win over injury victim Takayasu, Tochiozan is tied for the lead at 5-0 with Mongolian ozeki and summer tourney champion Terunofuji, who defeated third-ranked maegashira Sadanoumi (2-3).