Competing at the 2020–21 Japan Championships, Komatsubara/Koleto placed first in the rhythm dance, four points ahead of Muramoto/Takahashi. They won the free dance by almost twenty points, with both the silver and bronze medalists making serious errors, and took their third consecutive national title. They were named as Japan's representatives to the 2021 World Championships in Stockholm. They placed nineteenth, making the free dance for the first time. Komatsubara/Koleto's result qualified a berth for a Japanese dance team at the 2022 Winter Olympics.