[4] At the World Junior Championships held in Santander, Spain in October, Miyazaki won the girls' singles title as a first-year high school student.

She became the fourth Japanese player to win the world junior singles title, following Nozomi Okuhara, Akane Yamaguchi, and Riko Gunji.

[4] In October, Miyazaki won the Indonesia Masters II title, defeating Thai player Pornpicha Choeikeewong in the final.

[16] This victory made her the fourth high school student in history to win the championship, following Aiko Miyamura in 1989, Nozomi Okuhara in 2011, and Akane Yamaguchi in 2014.

[17] Miyazaki was selected as a member of the 2025 Japan National Team, coached by Takako Ida and Shōji Satō.