The reigning Olympic champion dominated in an overall time of 75.34 seconds, finishing well clear of China's Wang Beixing in second.
Russia's Olga Fatkulina had won yesterday's 1000m but had to settle for bronze in the shorter distance as she edged out Germany's Jenny Wolf.
It was a memorable day for South Koreans with Mo Tae-Bum emulating his compatriot by retaining the men's 500m.
It was a lot closer for Tae-Bum, who won by just .06 seconds from Japan's Joji Kato, with Dutchman Jan Smeekens coming third.
If it was South Korea's day in the individual events, the Dutch were untouchable in the team races, winning both men’s and women's pursuit titles.
The quartet of Jan Blokhuijsen, Sven Kramer, Koen Verweij and Jorrit Bergsma won in 3:42.03, with South Korea second and Poland third.
The Dutch women were even more dominant, Marrit Leenstra, Diane Valkenburg, Ireen Wust and Linda De Vries winning by nearly five seconds from Poland in second and South Korea third.