Grand champion Kakuryu and sekiwake Tochinoshin each won on Day 5 of the Summer Grand Sumo Tournament on Thursday to retain his share of the lead.Kakuryu overcame a spirited but short-lived effort from Bulgarian komusubi Aoiyama in the final bout at Ryogoku Kokugikan, while earlier Tochinoshin bested top-ranked maegashira Hokutofuji.The only other top-division wrestler to remain undefeated after five days of action is No. 8 Asanoyama.In the absence of fellow Mongolian yokozuna Hakuho, the 33-year-old Kakuryu remains on target for a sixth title following the withdrawal of up-and-comer Takake…READ FULL ARTICLE