[a] She previously represented Italy with Andrea Fabbri, with whom she won five international medals, including silver at the 2015 CS Ice Challenge.

[3] Komatsubara and Tim Koleto began a relationship after partnering on-ice in 2016, and they married in January 2017 in Okayama, Japan.

After a pause, she decided to continue skating and resumed training under Rie Arikawa in Okayama.

Their international debut came in October 2014 at the Ondrej Nepela Trophy, a Challenger Series (CS) event where they finished 6th.

After obtaining another silver medal, at the 2015 Santa Claus Cup, they repeated as national bronze medalists and went on to compete at the 2016 European Championships in Bratislava, where they finished 21st.

[12] In March 2018, Komatsubara/Koleto announced that they had moved to Montreal, Quebec, Canada, to train under Marie-France Dubreuil, Patrice Lauzon, and Romain Haguenauer.

[12] Following the Rostelecom Cup, the team moved to train in Japan (coached by Rie Arikawa) in order for Koleto to meet a residency requirement for a future citizenship application.

[14] Initially scheduled to begin the season at the 2019 CS Autumn Classic International, Komatsubara/Koleto withdrew early in the preseason as a result of Komatsubara having sustained multiple concussions that necessitated time away from training.

[16] On the Grand Prix, they were tenth out of ten teams at the 2019 Cup of China and then withdrew from the 2019 NHK Trophy.

[19] With the pandemic continuing to affect international travel, the ISU opted to base the Grand Prix primarily on geographic location, and Komatsubara/Koleto were assigned to compete at the 2020 NHK Trophy in a field consisting of only three Japanese dance teams, including the newly debuted pairing of former national champion Kana Muramoto and former Olympic medalist singles skater Daisuke Takahashi.

[22] 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.

[12] At their second event on the Grand Prix, the 2021 NHK Trophy, they finished in seventh place, 7.30 points behind domestic rivals Muramoto/Takahashi.

Koleto said afterwards, "there were a lot of things that didn’t go as we wanted them," but expressed satisfaction at having achieved new personal bests.

[29] The 2021–22 Japan Championships, the final national qualification event for the 2022 Winter Olympics, pitted Komatsubara/Koleto against Muramoto/Takahashi for the second time that season.

"[34] At the 2023 Four Continents Championships, Komatsubara/Koleto finished sixth in the rhythm dance and seventh overall, remaining ahead of their domestic rivals in both segments.

[36] Komatsubara/Koleto made their season debut at the 2023 NHK Trophy, placing ninth of nine teams in their lone international assignment of the fall.

Remarking on the quality of the competition, Koleto said "I was emotional to see three Japanese ice dance teams fight for Japan.

Traveling to Shanghai to compete, Komatsubara/Koleto finished eighth overall, outscoring their domestic rivals, and setting new personal bests.