A day after winning the Nagoya Grand Sumo Tournament with a perfect 15-0 record, yokozuna Hakuho said Monday that the fear of being forced into retirement had fueled one of his most memorable victories.

The 36-year-old great extended his record number of top-tier championships to 45 by beating ozeki Terunofuji in a dramatic final bout at Nagoya's Dolphins Arena.

The two Mongolian-born powerhouses came into the final day neck and neck at 14-0, but it was the sport's lone grand champion who emerged victorious, downing his younger rival with an arm lock throw.

"It's wonderful. It's something I'll truly remember, a big moment in my sumo career," Hakuho said in an online news conference.

The victory marked an impressive return from injury for Hakuho, who had knee surgery in March after missing all or part of the previous six grand tournaments.

Having been reprimanded by the Japan Sumo Association over the repeated absences, Hakuho staked his career on his performance in Nagoya, vowing to retire if he failed to meet expectations.

"I felt the pressure. I could picture the kanji characters for 'retirement' approaching right near me. So that made me more driven than I had ever been," Hakuho said.

Hakuho speaks during an online news conference on Monday. | Japan Sumo Association / via Kyodo
Hakuho speaks during an online news conference on Monday. | Japan Sumo Association / via Kyodo

His championship at 36 years and four months makes him the second-oldest Emperor's Cup winner since 1958, when the sport adopted its current system of six grand tournaments per year.

The lone yokozuna since the retirement of Kakuryu in March, Hakuho is set to be joined at the sport's highest rank by Terunofuji, who won back-to-back championships ahead of the Nagoya meet.

"(Terunofuji) fought with very consistent sumo. I expect him to continue as a new yokozuna," Hakuho said.