CHELYABINSK - Japanese pair Riki Nakaya and Nae Udaka continued their country's dominance of the judo World Championships in Chelyabinsk, Russia, by taking gold medals on Wednesday. London Olympics silver-medallist Nakaya won the men's under-73kg division by beating North Korea's shock finalist Hong Kuk Hyon. It was the 25-year-old's second world title having also triumphed in Paris in 2011. Udaka claimed her first world title with a golden score victory against now four-time world runner-up Telma Monteiro of Portugal in the women's under-57kg category. In a tight final there was almost nothing to separate the pair and it was decided on a penalty given to the four-time European champion. Monteiro also took silver in 2007, 2009 and 2010 while she was a world bronze medallist in 2005.–AFP