Answer
Besides Hakuhō, only three non-Japanese wrestlers have achieved the rank of yokozuna in sumo history. These wrestlers include Konishiki Yasokichi from Hawaii, Musashimaru Kanyō from Samoa, and Asashōryū Akinori from Mongolia. While foreign-born wrestlers were not permitted until the 1960s, they have achieved remarkable success in the sport, with Hakuhō holding the record for the most tournament championships won.