Prague — Kaori Sakamoto bid farewell to figure skating with a fourth world championship title before retirement as one of the most decorated skaters in decades. Sakamoto took to the ice to cheers from a packed arena in Prague and delivered a typically artistic and consistent final free skate to stay ahead of her Japanese teammate Mone Chiba. After signing off to Edith Piaf's “Non, Je Ne Regrette Rien,” Sakamoto made a double fist pump as her coaches hugged rink-side and Chiba stood to applaud. Minutes later, Sakamoto jumped up and danced in celebration at leaving on a personal-best total 238.28 points and embraced Chiba, who scored 228.47. “I'm so happy,”...