Hamano made her WE League debut for INAC Kobe Leonessa on 12 September 2021 in a 5–0 victory over Omiya Ardija Ventus.
[3][4] There, she made 17 league appearances and scored 7 goals during the 2023 Damallsvenskan season,[1] before being recalled in September after sustaining a shoulder injury.
[5] After recovering from injury, Hamano made her Women's Super League debut for Chelsea on 17 December 2023 in a 3–0 away win over Bristol City, replacing Lauren James in the second half.
[6] In July 2022, Hamano was included in the Japan under-20 team for the 2022 U-20 World Cup,[7] where they finished as runners-up after losing to Spain in the final.
[8] Hamano made her senior team debut on 6 October 2022, when she came on as a substitute for Mina Tanaka in the 69th minute of a 2–0 friendly win over Nigeria.