Teramoto was born in Komaki, Aichi. Her first major international senior competition was the 2011 World Artistic Gymnastics Championships in Tokyo, Japan. In the team all-around finals, she contributed on vaulting, uneven bars, and balance beam towards the Japanese team's 7th-place finish. She also qualified for the uneven bars final in 8th place. She ended up finishing in a tie for 5th with Gabrielle Douglas, finishing ahead of teammate Koko Tsurumi. That event was won by Viktoria Komova of Russia.