Changes

Sung-hoon Sunghoon made his international junior debut during the 2016-17 figure skating season when he became age-eligible. He earned a silver medal at Asian Figure Skating Trophy, and participated in ISU Junior Grand Prix in Estonia as a representative of South Korea. Next year, he won another silver medal at Asian Figure Skating Trophy, and participated in ISU Junior Grand Prix in Poland.

During the 2018-19 figure skating season, Sung-hoon Sunghoon became age-eligible for senior competitions. He participated in two ISU Challenger Series events, Asian Figure Skating Trophy and Alpen Trophy.