At the 2014 World Junior Championships in Sofia, Bulgaria, she placed eleventh in the short program, seventh in the free skate, and eighth overall.

Making her senior international debut, Hongo won gold at the 2014 Triglav Trophy, her final event of the season.

Hongo began the 2014–15 season with gold at the Asian Open and then bronze at the 2014 Finlandia Trophy, an ISU Challenger Series event.

At her second Grand Prix event, the 2014 Rostelecom Cup, Hongo won the gold medal ahead of Russia's Anna Pogorilaya by 4.57 points after placing second in the short program and winning the free skate.

[6] Hongo was first alternate to the Grand Prix Final[7] and was later called on to compete after qualifier Gracie Gold withdrew with a foot injury.

Hongo began her season by winning both segments in a domestic competition called the Summer Cup, held in Shiga prefecture, Japan.

Ranked 4th in the short and 5th in the free, Hongo came away with the bronze medal at the 2016 Four Continents in Taipei, behind Satoko Miyahara and Mirai Nagasu.

[10][11] Hongo competed at the Chubu Regionals, a qualifier for the 2020–21 Japan Championships and placed second behind Mako Yamashita and ahead of Rin Nitaya.