( CNN ) -- Dolgorsuren Dagvadorj a big man with big ambitions . In Mongolia there is no one is more famous than Dagvadorj , who is probably best known by his Japanese name , Asashoryu . For 15 years Dagvadorj dominated sumo wrestling and became the most successful grand master the sport had ever seen . He retired in 2010 after the controversial wrestler was involved in a brawl outside a Tokyo nightclub . It brought the champion more bad publicity in Japan , but in his native Mongolia he is a hero . Locals call him simply `` The champ '' . Still only 30 , he is now embarking on a second career as a businessman . `` My whole generation has experienced the opening of Mongolia , '' he says . `` So I feel it is a great honor to be alive in this new free country . I feel blessed . '' He has slimmed down since his professional sumo days , but his appetite for success is as big as ever . `` It is difficult to say if I will become world famous billionaire , '' he says . `` Sumo and business are completely different , different worlds but it is my ambition to become a big businessman . We should all strive for success especially as Mongolia has such a bright future . '' Around twenty years ago , Mongolia abandoned a Soviet-style system and embraced economic and political reform . Vast quantities of minerals are driving the country 's economic growth and with that wealth comes the potential for businessmen like Dagvadorj to make their mark on modern Mongolia . Dagvadorj owns a circus in the capital Ulaanbaatar and is behind a project to build a huge residential and entertainment complex . To finance it all he has started his own investment bank . He laughs at the idea that he might one day be president , but does n't rule it out . `` Maybe , '' he says . `` Maybe . ''
Dolgorsuren Dagvadorj was sumo 's most successful wrestler known as Asashoryu . He won the prestigious title of "yokozuna" in May 2000 and held it for a record 15 years before retiring at the age of 37 after losing to yokozuna Hakuho on March 25, 2011. Owns a circus and other real estate and has set up an investment bank .