She earned a master's degree in mathematical sciences at the University of Tokyo in March 2019,[3] and completed a Ph.D. there in 2022.
Her dissertation, Differential models for the Anderson dual to bordism theories and invertible QFT's, was supervised by Yasuyuki Kawahigashi.
[5] She was promoted to associate professor in 2023[3] and will be joining the Perimeter Institute for Theoretical Physics in April 2025.
[6] Yamashita was one of the recipients of the 2021 Takebe Katahiro Prize for Encouragement of Young Researchers of the Mathematical Society of Japan.
[3][7] She received the 2022 Grand Prize in the Marie Sklodowska Curie Awards of the Japan Science and Technology Agency "for her work on mathematical applications to particle physics".