Last Updated: Wed, 16 Oct 2013 15:41
Shinji Kagawa believes his lack of action for Manchester United has affected his performances for Japan.
The midfielder played for his country in their friendly defeats to Serbia and Belarus during the international break and Kagawa concedes he was not at his best.
The 24-year-old has failed to secure regular football under new United boss David Moyes, managing just 45 minutes of Premier League football to date, and Kagawa has indicated he is growing frustrated at Old Trafford.
"Personally, I felt strongly after these two matches that I need to play more and, as a team, there are many things we need to do. So we all need to go back to our European or J-League clubs and take what we learned in these two matches and work to fix those problems," he told the Japanese media following the 1-0 loss to Belarus on Tuesday.
"There's a matter of fitness and there's also that atmosphere of playing for my country. It's different from the atmosphere at United, but you still get a good feel for being on the pitch when you play regularly.
"Maybe it's because I'm not used to being on the pitch of late, but I didn't feel like I was able to enter these two games properly. During tough times like these I have to improve myself."
Kagawa has been heavily linked with a return to former side Borussia Dortmund and could well be set for a January exit as Moyes has been credited with an interest in a number of midfielders in recent weeks, meaning the Japan international could be sold to make room for any potential new arrivals.
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