Reigning world champion Shohei Ono beat rival and London Olympic silver medalist Riki Nakaya by ippon in the men's 73-kg final to claim his maiden title at the National Invitational Weight Class Championships on Sunday.

The 22-year-old Ono executed a well-timed "ukiotoshi" floating drop throw on Nakaya in one of the featured matches in the seven men's and women's weight classes contested on the second day at Fukuoka Kokusai Center.

Nakaya, 24, failed in his bid for his third consecutive title in the event, which also serves as a qualifier for Japan's team to the world championships to be held in Chelyabinsk, Russia, in August.