[3] When the transfer was officially confirmed later that month, Chelsea manager Emma Hayes said of Ji: "She is one of the best midfielders in the world and our fans will love her.

[9] In October 2015 she also scored in Chelsea's 4–0 win over Sunderland which secured the club's first FA WSL title and a League and Cup double.

[13] On 24 May 2022, Ji returned to her homeland and joined WK League side Suwon FC, her first spell with a South Korean club.

[15] On 24 January 2024, the National Women's Soccer League club Seattle Reign FC announced that they had signed Ji on a two-year contract through the 2025 season.

On 30 November 2006, she became the youngest goalscorer (15 years, 282 days) for the South Korean senior team after scoring two goals against Chinese Taipei at the 2006 Asian Games.