2021: After spending several years with Cerezo Osaka Sakai, Hamano changed clubs in 2021 when she joined INAC Kobe Leonessa in the newly-founded WE League. She started with a bang, too, scoring twice on her debut in the league.
2022: Hamano was part of the Japan team that reached the final of the U20 Women's World Cup in Costa Rica. She was named the tournament's best player, picking up the Golden Ball award, and also claimed the Silver Boot after scoring four goals in six games. In October, she made her senior international debut as Japan beat Nigeria.
2023: In the January transfer window, Hamano signed for Chelsea on a contract until the summer of 2027 and, simultaneously, joined Hammarby on loan for the year. She helped the Swedish club win the league and also represented Japan at her first senior World Cup.
2024: In her first season with Chelsea, Hamano would have to wait patiently for her opportunities but she would make some big contributions before the end of the 2023-24 season, to help the Blues win yet another league title. The 19-year-old also became an Olympian in the summer.
2025: Hamano is now a regular starter for Chelsea and a regular game-changer for one of the best teams in Europe.