Grand champions Kakuryu and Hakuho stayed unbeaten Thursday to keep their share of the lead at the Nagoya Grand Sumo Tournament.The two Mongolians competing at the sport's highest rank are tied at 5-0 with No. 7 maegashira Tomokaze and No. 16 Terutsuyoshi following five days of the meet at Dolphins Arena.Kakuryu, who is aiming for his sixth championship, fended off an aggressive attack from No. 2 Aoiyama (3-2) in the final bout of the day.The yokozuna resisted Aoiyama's slaps to the face, and charged the 193-kilogram Bulgarian toward the edge before pulling him down.Hakuho demonstrated his …READ FULL ARTICLE