The year she turned 15, she made her senior international debut for South Korea at the Peace Queen Cup. She is the youngest player ever called up to the national team. In July 2009, she scored two goals in the Summer Universiade final against Japan and was named the tournament’s most valuable player. In August, her winner in the AFC U-19 Women’s Championship semifinal against China in Wuhan secured a place at the following year’s U-20 World Cup in Germany.
The breakthrough yearThe year she turned 19, she scored eight goals at the FIFA U-20 Women’s World Cup in Germany, led South Korea to third place and received the Silver Ball and the Silver Shoe. It was the first time South Korean football had finished third at a FIFA tournament. That November, she won bronze at the Guangzhou Asian Games, and in December she joined INAC Kobe in Japan and was named the Korea Football Association’s women’s Player of the Year.
By 2013, she had helped INAC Kobe Leonessa win three straight Nadeshiko League and Empress’s Cup titles. In 2014, she joined Chelsea Women in England and became the first Korean woman to play in the Women’s Super League (WSL).
In June 2015, she was named in the squad for the Women’s World Cup in Canada, and in August she scored the winner in the FA Cup final against Notts County at Wembley Stadium, giving Chelsea their first FA Cup. She became the first Korean to score at Wembley.
In 2018, she played in the AFC Women’s Asian Cup match against Australia for her 100th cap and joined the Century Club. She is the fourth Korean woman to do so, after Kwon Hah-nul, Kim Jung-mi and Cho So-hyun. In 2019, she started the Women’s World Cup group-stage match against Norway in France.
In 2021, she became co-president of the Korea Professional Footballers’ Association with Lee Keun-ho. In December 2020 she had become the first foreign player to make 100 appearances in the WSL. In May, she was part of Chelsea’s second straight WSL title and started the Champions League final, but Chelsea lost 4-0 to Barcelona and finished as runners-up. In 2022, she scored a penalty in the AFC Women’s Asian Cup final against China, raising South Korea’s women’s record to 64 goals, but the team lost 3-2. In May, she returned from England and joined Suwon FC Women of the domestic WK League.
In 2023, she scored a free-kick equalizer in the WK League championship final but finished as runners-up, and at the awards she was named best midfielder for a second straight year. In 2024, she moved to Seattle Reign FC in the United States, and in November, as president of the players’ association, she pointed to poor conditions at domestic women’s tournaments.
In July 2025, she scored the winning penalty against Taiwan in the EAFF E-1 Championship and lifted an international trophy in her 20th year with the national team. In September, she was loaned to Birmingham City in England. In January 2026, she rejoined Suwon FC Women, and in March she scored the opening goal as Suwon FC Women beat the previous champions, Wuhan Jiangda, 4-0 in the AFC Women’s Champions League quarterfinal. In the May semifinal, she missed a penalty in a comeback loss to North Korea’s Naegohyang, and in August a dispute arose over a referee’s remark during a match. In September, she scored her 76th senior international goal against Bangladesh in the Asian Games group stage, and South Korea drew 1-1 with North Korea.
Ji So-yun (born Feb 21, 1991) made her senior international debut for South Korea at the Peace Queen Cup in 2006, the year she turned 15, and became known in 2010, the year she turned 19, when South Korea finished third at the FIFA U-20 Women’s World Cup and she won the Silver Ball. She joined Chelsea Women in England in 2014, the year she turned 23.
Ages are by calendar year (the year minus the birth year), birthdays aside.