She started playing football for Shinmei JSC Sports Boy Scouts at the age of five.

As an eleven-year-old, she was invited to a national team camp for U12 players by the Japan Football Association.

[4] Hayashi begun her career with Cerezo Osaka Sakai in 2013 as they entered the second division Challenge League.

On 16 December 2020, Hayashi signed a contract with Swedish Damallsvenskan side AIK Fotboll.

[4] On 8 September 2022, Hayashi signed a two-year-contract with West Ham United for an undisclosed fee from Swedish Damallsvenskan side AIK Fotboll.