The Fukushima native becomes the first new sekiwake in 86 years to claim the championship.
The lone yokozuna won his second straight tournament at the sport's highest rank.
The Mongolian grand champion won his second straight title at the sport's highest rank.
Takakeisho remains tied for the lead with Terunofuji, who coasted to an easy win over Endo.
The Mongolian grappler is eager to prove he is a dominant force to be reckoned with as a lone yokozuna.
The 29-year-old Mongolian was ensured of his fifth title when Myogiryu lost an earlier bout.
Terunofuji loses for the first time in his debut at the sport’s highest rank.
By beating Takakeisho in a playoff, the 29-year-old Mongolian could be promoted to sumo’s highest rank for the July tournament in Nagoya.