Kaori Sakamoto, Mai Mihara and Mana Kawabe sweep the Challenge Cup women's event, while Shun Sato and Sota Yamamoto finish 1-2 in the men's.
The 22-year-old world champion, who won her previous national titles in 2018 and 2021, lands six clean triples and triumphs by more than 13 points.
Positioned in second place after the short program, Mai Mihara displayed veteran poise in her free skate to "El Amor Brujo" to secure the victory.
The 22-year-old Yamamoto landed three clean quadruple jumps and five triples en route to victory in Japan’s biggest summer competition.
Without Yuzuru Hanyu, Nathan Chen and suspended Russian skaters, the 2022-23 Grand Prix season will have a different vibe.
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.
The Olympic bronze medalist earned level fours on all of her spins and step sequence.
Daisuke Takahashi and Mao Asada were the first two skaters to sweep both singles titles for Japan, doing so at the 2010 world championships.
Valieva wilted under the Olympic heat in titanic fashion, thereby allowing the 17-year-old Shcherbakova to win the gold.
Valieva, the world junior champion in 2020, earned level fours for her spins and step sequence. She wept as she finished her program and again when...
Should Valieva be disqualified, Russian world champion Anna Shcherbakova would become the favorite for the gold medal.
“The Olympics are not a recital,” Hanyu said. “It's a place you must win. For that reason, I'll be strongly determined.”