Former grand champion Hakuho announced the name of his new company on Saturday as he looks to promote the sport through the concept of a "world sumo grand slam" after leaving the Japan Sumo Association.Earlier in the day, the Japan Sumo Federation, which oversees the amateur side of the sport, unanimously elected the chairman of Toyota Motor Corp. and long-term Hakuho supporter Akio Toyoda as its new head.Hakuho's new company, Hakuho Dayan Sumo & Sports Inc. named after a Mongolian emperor, was unveiled at a party with some 200 of his supporters in Tokyo, including former Japan football sta…READ FULL ARTICLE