Riku Miura and Ryuichi Kihara won Japan's maiden pairs figure skating world championship title Thursday, while Shoma Uno made an impressive start to his men's title defense at Saitama Super Arena near Tokyo.After topping Wednesday's short program, Miura and Kihara scored 141.44 to place second in the free skate and first overall with a total of 222.16 on Day 2 of the ISU World Figure Skating Championships.They finished 4.68 ahead of American rivals Alexa Knierim and Brandon Frazier, with Italy's Sara Conti and Niccolo Macii totaling 208.08 for bronze.Last year's champions Knierim and Frazie…READ FULL ARTICLE