Japanese forward Shinji Kagawa, a sensation in his first year for German Bundesliga leader Borussia Dortmund, will miss the rest of the season after suffering a foot injury while playing for Japan in its Asian Cup semifinal victory over South Korea.

Kagawawa, 21, joined Dortmund last summer from Japanese second division club Cerezo Osaka for a transfer fee of about $400,000. He exceeded expectations by scoring seven goals in 18 Bundesliga appearances, helping Dortmund to an 11-point lead atop the standings.

"It hasn't really sunk in yet, it'll take me some time," said Kagawa. "Now I need to try and get back to playing as quickly as I can. I have already had an injury in the same place in 2009 and that was sorted out in a month, but I haven't felt as bad as now. We have a good team despite our youth and I have a good feeling that we will win the title."