Seol signs for Pohang
Seol has signed a one-year deal with the K-League's Steelers after leaving English Premier League team Fulham last week.
"I have come back to the country after 10 years. I will repay fans' support by showing advanced football skills acquired from Europe," Seol was quoted by Yonhap News agency.
The 31-year-old midfielder was a member of the side that finished fourth at the 2002 World Cup, which South Korea co-hosted with Japan.
"He's moving on and we wish him all the best," Fulham manager Roy Hodgson said on the club website.
Seol, who hopes to go to the World Cup this year, joined from Reading in 2007 but has featured in only two league games this season.
"He's even had one or two spells in the team when he's performed well but unfortunately during those two years he's not been able to convince me that I should be using him week-in, week-out as the number one name on the list," added Hodgson.