The 33-year-old midfielder had joined the Reds in February ahead of their AFC Champions League campaign.

The veteran had revealed he wanted to stay with the Reds beyond his short-term contract but no deal has been struck.

The 16-time South Korea international has now put pen to paper with Chunnam Dragons, currently home to Aussie defender Tomislav Mrcela.

Kim scored one goal in 10 appearances for the Reds.

United currently has two visa players signed in Baba Diawara and Isaias, with Iacopo La Rocca and Marcelo Carrusca qualifying as non-visa foreigners.

The Reds previously allowed Spanish attacker Sergio Cirio to leave the club to open up another visa spot.

Adelaide's only signing this off-season has been goalkeeper Paul Izzo, with German coach Marco Kurz only appointed a fortnight ago.

The Reds have lost Dylan McGowan, George Mills, Jesse Makarounas, John Hall, Cirio and Eugene Galekovic.