The Hawaiian, whose real name is Chad Rowan, displayed the power that helped him attain sumo's highest rank of yokozuna in January by cutting a swathe through his opponents in the first four rounds.
In the final, Akebono easily disposed of the 20-year-old rising star Takanohana, who was clearly tired after a hard-fought victory over his older brother, Wakanohana, in the semi-finals.
The biggest upset came in the second round when Konishiki, the 29- year-old champion from Hawaii, was pushed out by Naminohana, a sumotori three ranks below him.
Afterwards Akebono said: 'We tried our best to give the audience a good show.' He was pleased to win in America and with the crowd's enthusiasm for all the sumotori.
'I think everybody was giving me a big round of applause, but it wasn't because I was from America. They accepted everyone from Japan, which was good.'