[1] She made her professional debut on April 22, 2019 in the preliminary round of the Ryusei tournament in western Japan at age 10 years and one month, breaking the record held by Rina Fujisawa in 2010 at age 11 years and 8 months.

She started playing the ancient board game with her father when she was three and has been competing in national tournaments in Japan since she was seven.

The parents of Nakamura Sumire decided to send her to South Korea for Go training in 2017 because they believed she needed more challenging opponents to continue improving her skills.

[8] On 6 February 2023, at the age of 13 years and 11 months, Nakamura became the youngest ever winner of the Women's Kisei.

[11][12][13] She secured her first title on June 10, 2024, just three months after transferring to South Korea, defeating Yu-Jin Oh (오유진) in the finals of the International Go Chunhyang Selection Tournament (국제바둑춘향 선발대회)..[14]