Former Barcelona prodigy Lee Seung-woo, the 20-year-old Verona winger who only made his international debut in Monday's 2-0 win over Honduras, keeps his place in the squad.
The 2002 semi-finalists are in Group F of the World Cup and kick off against Sweden on June 18 before taking on Mexico and defending champions Germany.
South Korea's 23-man squad for the 2018 World Cup:
Goalkeepers: Kim Seung-gyu (Vissel Kobe), Kim Jin-hyeon (Cerezo Osaka), Cho Hyun-woo (Daegu FC).
Defenders: Kim young-gwon (Guangzhou Evergrande), Jang Hyun-soo (FC Tokyo), Jung Seung-hyun (Sagan Tosu), Yun Yong-sun (Seongnam FC), Oh Ban-suk (Jeju United), Kim Min-woo (Sangju Sangmu), Park Joo-ho (Ulsan Hyundai), Hong Chul (Sangju Sangmu), Go Yo-han (FC Seoul), Lee Yong (Jeonbuk Hyundai Motors).
Midfielders: Ki Sung-yueng (Swansea City), Jung Woo-young (Vissel Kobe), Ju Se-jong (Asan Mugunghwa FC), Koo Ja-cheol (FC Augsburg), Lee Jae-sung (Jeonbuk Hyundai Motors), Lee Seung-woo (Hellas Verona), Moon Seon-min (Incheon United).
Forwards: Kim Shin-wook (Jeonbuk Hyundai Motors), Son Heung-min (Tottenham Hotspur), Hwang Hee-chan (FC Red Bull Salzburg).