In the absence of Mario Gotze, he took over the mantle as a key performer for Dortmund as the club both retained the title and lifted and German Cup in some style last season. In addition to contributing 13 goals in the league, he scored three times in the German Cup.
Sir Alex Ferguson made a personal check on Kagawa's form in the final against Bayern Munich in Berlin, despite it coming only a day before United's last-day trip to Sunderland, and he netted the opening goal and dazzled in a convincing 5-2 win against the Champions League runners-up.
Currently focused on his international duties, Kagawa was influential in a 3-0 win against Oman over the weekend but wasn't able to add to his goal tally. The talented performer promises to be an entertaining new arrival at Old Trafford - and the club's first ever Japanese player - once the formalities of his transfer are completed.