The Japanese star has been a hit for Dortmund in the Bundesliga this season.
“We’ve had some great results at Borussia Dortmund recently, but I’m not 100 per cent satisfied with my own performance. There’s room for improvement,” Kagawa was quoted as saying by fifa.com.
“I’ve settled very well, and it’s been much quicker than I thought it would. I’m very happy in Dortmund.
“There’s a significant difference. The really crucial thing here at BVB is that everyone works together so hard as a team. I’m a part of that, and I’m delighted I’ve been able to contribute to our good results.
“All our players work really hard in every game. Our team is young and hungry, and we’re more and more motivated with every game we win.”