High Quality Content by WIKIPEDIA articles! Yamamotoyama Ry ta (born May 8, 1984 as Yamamoto Ry ichi) is a sumo wrestler from the city of Saitama in Saitama Prefecture, Japan. MAking his professional debut in January 2007, he reached the top makuuchi division in January 2009. HIs highest rank to date has been maegashira 9. AT 264 kg (570lb), he is the heaviest Japanese-born sumo wrestler ever. YAmamotoyama won several local, national and world sumo championships before entering Nihon University in 2003. HE won a total of five championships at Nihon University. HE then entered professional sumo as a member of the Onoe stable. HE broke the record for the largest new recruit, weighing in at 233kg in 2007. THe previous record holder, Hokutomori, weighed in at 205 kg when he joined professional sumo in 1994.