Hakuho is facing his greatest enemy ever now — himself.

Sumo's lone yokozuna overpowered Mongolian countryman Kyokutenho on Sunday, extending his incredible winning streak to 55 bouts to inch closer to immortality in the pantheon of the ancient sport.

He improved to 8-0 at the 15-day Autumn Grand Sumo Tournament and shares the lead with Bulgarian ozeki Kotooshu.