Kagawa is still coming to terms with the fact that he is part of an illustrious club that has dominated English football throughout the Premier League era.
Fresh from grabbing a historic winner for Japan in a friendly victory over France, the 23-year-old playmaker said: "I am now a Manchester United player and the fans and my team-mates expect more from me.
"Since arriving in Manchester I have had to watch my behaviour on and off the pitch. In Japan and Dortmund I didn't have so much pressure.
"Three years ago I couldn't have imagined evolving so quickly and being at a great club like Manchester United. It is proof that you never know what can happen."