FC Porto forward Suk Hyun-jun and Guangzhou R&F defender Jang Hyun-soo are head coach Shin Tae-yong's other wild-card selections.
"We may not have renowned players like we had in London," Shin said at a press conference in Seoul.
"But I want fans to have trust in our players and watch how they fulfil expectations."
South Korea have been paired with world champions Germany, 2012 gold medallist Mexico and Fiji in Group C.
(Reporting by Shravanth Vijayakumar in Bengaluru; Editing by Amlan Chakraborty)
