TOKYO—Japan’s Takanori Nagase won the men’s -81kg judo gold medal at the Tokyo Olympics by beating Saeid Mollaei of Mongolia in the final, extending the gold rush by Japanese judokas. Rio bronze medallist Nagase’s victory marked a fifth judo gold medal for hosts Japan at the Games, edging them closer to their previous Olympic record of eight titles in 2004 in Athens. In a grueling final that lasted over five and a half minutes, the 27-year-old Nagase, an Uchi Mata inner thigh throw specialist, delivered an ashi-guruma foot wheel to throw Mollaei down on the tatami mats to earn a waza-ari sudden-death overtime victory. Shamil Borchashvili of Austria and Matthias Casse of Belgium were awarded bronze. When the judge confirmed his win, Nagase burst into tears. “That was the moment when my goal of winning Olympic gold was met, so I couldn’t help but shed tears,” Nagase told reporters after …