Ozeki Kirishima and No. 13 maegashira Kotoeiho remained atop the leaderboard at the Summer Grand Sumo Tournament on Thursday, while struggling ozeki Kotozakura withdrew on Day 12.No. 15 maegashira Tobizaru suffered a costly defeat, dropping into a tie for second place at 9-3 with three other wrestlers at Tokyo's Ryogoku Kokugikan.A day after his losing record was confirmed, Kotozakura pulled out of the 15-day tournament with a back issue, joining an absentee list featuring yokozuna Onosato and Hoshoryu, as well as Ukrainian ozeki Aonishiki.Kotozakura (3-9) is set to enter the next tournamen…READ FULL ARTICLE