Performing to Madame Butterfly in the free skate, the 2015 world silver medallist reeled off seven clean triples, including a triple Lutz-triple toe combination as well as level-four spins and footwork, at the Olympic Skating Centre.

She posted a season’s best 143.31 points for a total of 214.03.

"I am very happy and satisfied with today’s performance and to get my best scores," Miyahara, 19, said.

"After the injury, this is the first big step.

"The most important event, the Japanese nationals, are coming next month.

"I’ll keep working hard to be able to do my best."

Miyahara’s compatriot Kaori Sakamoto finished second with 210.59 points to win her first Grand Prix medal.

The 2017 world junior bronze medallist set a personal best 141.19 points in the free skate.

The United States’ Bradie Tennell, competing in her first senior International Skating Union (ISU) Grand Prix event, earned the bronze medal with 204.10 points.

She managed a personal best 137.09 points in the free skate.

None of the medallists qualified for next month’s ISU Grand Prix of Figure Skating Final, due to take place in Japanese city Nagoya from December 7 to 10.

Miyahara is the first substitute, however.

Canada’s Gabrielle Daleman, the 2017 world bronze medallist, dropped from third place to sixth after some errors.

Home favourites Maia and Alex Shibutani claimed the ice dance crown after winning the free dance segment today.

Dancing to Paradise by Coldplay, the brother-and-sister team delivered an excellent performance with beautiful lift and intricate footwork, collecting a level four for the spin, twizzles and lifts.

They amassed a season’s best 115.07 points for an overall total of 194.25.

Italy’s Anna Cappellini and Luca Lanotte, the 2014 world champions, claimed the silver medal after scoring 108.93 points in the free dance for a total of 181.63.

Both they and the Shibutani siblings have qualified for the Grand Prix Final.

"Alex and I are very proud of how we skated this weekend," Maia Shibutani said.

"This was the longest time that we ever had in a Grand Prix season between our two Grand Prix and we feel very strongly about how well we’ve used our time following Cup of Russia.

"These two performances were really heading into the direction that we are looking for.

"This was the competition we wanted to have before the Grand Prix Final."

The bronze medal went to Russia’s Victoria Sinitsina and Nikita Katsalapov, who achieved a personal best 107.81 points in the free dance for 176.53 overall.