Kagawa has successful operation
"I tell you the truth. I was very disappointed that I couldn't play in the Asian Cup final because of the injury," Kagawa, who plays for German side Borussia Dortmund, wrote on his website.
"I felt downhearted," he said, adding that yesterday's operation was successful.
"I received many messages from my supporters after I got the injury. I want to thank them. I'm going to take a rest and concentrate on rehabilitation. I want to go back to the pitch as soon as possible," he added
Kagawa suffered the toe injury during a game against Korea Republic in the semi-finals and returned to Germany before Japan beat Australia 1-0 in the final.
Team doctors said that Kagawa would miss the rest of the season, but the Borussia Dortmund star vowed to be back in action one month before the league competition ends.
Despite the injury he played a key role in Japan's Asian Cup success, twice equalising against Qatar in the knockout round.