The 31-year-old forward, who moved to Urawa from the Bundesliga's Eintracht Frankfurt in 2008, has scored 23 goals for Japan and 68 goals in 168 games in the J.League first division, becoming the top goal scorer in 2002.
"I'd like to thank my supporters for their help in the past two and a half years. I'm going to do my best to help my new club, Suwon Samsung, keep winning," Takahara said in a statement.
Takahara, who also played for German club Hamburg, scored a total of 25 goals in 135 games in his six seasons in the Bundesliga.
Suwon Samsung have been struggling this season at 11th place in the K-League, but reached the quarter-finals in the AFC Champions League.