Grand champion sumo wrestler Harumafuji was involved in a drunken brawl late last month that left fellow Mongolian competitor Takanoiwa hospitalized with serious injuries, his stablemaster admitted to sumo administrators Tuesday.Harumafuji's stablemaster Isegahama said that his wrestler was involved in the attack, the first public acknowledgment of the incident.According to sources familiar with the situation, Harumafuji was drinking with other Mongolian wrestlers in late October during a regional tour in Tottori, when the yokozuna, angered by Takanoiwa's attitude, struck him with a beer bo…READ FULL ARTICLE