Mutsu Tsukumo was considered to be one of the greatest fighters of all time. He conquered Japan’s mixed martial arts (MMA), became the US boxing heavy weight champion and later came up on top at the Vale Tudo in Brazil where the best of the world compete. He accomplished all of this in 2 years and took the competitive fighting world by storm. However, just as the world recognized him to be the best, Mutsu Tsukumo disappeared into thin air and has not been heard of by anybodyShow more