Sugai, a 17-year-old high school student in Tokyo, also won the prize for contemporary dance.
"I can't believe that I won," Sugai told reporters after an award ceremony. "I feel as if I am still in a dream of dance."
Sugai will be awarded a scholarship to cover her tuition at the ballet academy of her choice for a year. Sugai said she wants to go to Birmingham Royal Ballet in Britain.
The video of the performance:
Sources: 1, 2, 3, 4, 5