The Olympic bronze medalist's victory gave Japan its first world title by a woman since Mao Asada won the last of her three titles in 2014.
American Vincent Zhou and Japanese teenager Mana Kawabe are both in second place heading into the free skate.
“Everything is improving now and technically spiritual,” Uno said. “The most important thing I have practiced is the quadruple salchow.”
Their pairs figure skating medal was Japan’s first on the GP circuit since Narumi Takahashi and Mervin Tran claimed the silver at the NHK Trophy in...