Early career Yamashita began learning how to skate in 2009 at the age of seven. That same year, she joined the Grand Prix Tokai Club, where
Machiko Yamada became her coach. On the novice level, she won the bronze medal at the 2013–14 Japan Novice B Championships and silver at the 2015–16 Japan Novice A Championships.
2016–2017 season Making her junior international debut on the
ISU Junior Grand Prix series, Yamashita won the bronze medal at the
2016 JGP Japan and
2016 JGP Estonia. She subsequently finished sixteenth at the
2016–17 Japan Junior Championships.
2017–2018 season Yamashita started the season by finishing fourth on the junior level at the
2017 Asian Open Trophy. In September, she won the bronze medal at
2017 JGP Austria behind
Anastasia Tarakanova and
Lim Eun-soo. Yamashita then won the silver medal at her next JGP event,
2017 JGP Croatia, behind
Sofia Samodurova. She subsequently won the silver medal at the
2017–18 Japan Junior Championships and placed tenth at the
2017–18 Japan Championships. In March, Yamashita won the bronze medal at the
2018 World Junior Figure Skating Championships.
2018–2019 season: Senior debut In August 2018, Yamashita made her senior international debut, winning the bronze medal at the
2018 CS Asian Trophy, behind
Lim Eun-soo and
Yuna Shiraiwa. In September, she also won the bronze medal at the
2018 CS Lombardia Trophy, behind
Elizaveta Tuktamysheva and
Sofia Samodurova. In October, Yamashita debuted on the
ISU Grand Prix series in the
2018–19 season. She won the silver medal at
2018 Skate Canada behind
Elizaveta Tuktamysheva and ahead of
Evgenia Medvedeva, the
2018 Olympic silver medalist. She then competed at
2018 Rostelecom Cup, where she placed seventh. Yamashita finished the season by placing sixth at the
2018–19 Japan Championships.
2019–2020 season Yamashita began the season with a sixth place at the
2019 CS Ondrej Nepela Memorial. She finished twelfth out of twelve skaters at the
2019 Skate America. Yamashita fared better at the
2019 NHK Trophy, where she placed fifth. At the
2019–20 Japanese Championships, Yamashita was fifth in the short program but dropped to eleventh place overall after finishing sixteenth in the free skate.
2020–2021 season Yamashita was invited to be a part of Team Red at the Japan Open after the withdrawal of
Marin Honda. Competing domestically, she placed sixth at Western Sectionals. With the
COVID-19 pandemic prompting the ISU to assign the
Grand Prix based primarily on geographic location to limit international travel, Yamashita was assigned to compete at the
2020 NHK Trophy as part of a field of Japanese skaters and South Korea's
You Young. She placed third in the short program. In the free skate, Yamashita attempted a
quad Salchow in international competition for the first time, landing it with a full downgrade, as well as making errors on two other jumps. She dropped to fifth place overall. Yamashita placed thirteenth at the
2020–21 Japan Championships.
2021–2022 season For a second consecutive year, Yamashita placed thirteenth at the
2021–22 Japan Championships.
2022–2023 season Competing at the
2022–23 Japan Championships, Yamashita placed sixteenth.
2023–2024 season At the
2023–24 Japan Championships, Yamashita unexpectedly placed second in the short program, albeit nearly nine points behind segment leader
Kaori Sakamoto. She dropped to eighth overall after the free skate, but said that she felt her stamina in that segment was improving. She closed the season with a bronze medal at the 2024 Tallink Hotels Cup.
2024–2025 season Yamashita started the season with a silver medal win at the
2024 Asian Open Trophy. She subsequently went on to compete at the
2024–25 Japan Championships, where she finished in sixth place. Yamashita then closed off the season in February by winning bronze at the
2025 International Challenge Cup.
2025–2026 season Yamashita opened her season with a sixth-place finish at the
2025 CS Kinoshita Group Cup. She then went on to finish fifteenth at the
2025–26 Japan Championships. == Programs ==