Making her senior international debut, Higuchi won gold at the 2016 CS Lombardia Trophy in Bergamo, Italy. She also competed at the 2016 Japan Open. She placed fifth in the individual event and first as a member of Team Japan in the team event. Higuchi's first Grand Prix event was the 2016 Trophée de France in Paris, France. She placed fifth in the short program, third in the free skate, and third overall. At her second Grand Prix event of the season, the 2016 NHK Trophy, Higuchi placed fifth in the short program, fourth in the free skate, and fourth overall.