a bargain €350,000.
In 2010/11 he scored eight goals in 18 games to earn a place in the Bundesliga Team of the Season, despite being sidelined for a lengthy spell.
And he was a key performer as Dortmund both retained the title and lifted and German Cup in some style the following season. In addition to contributing 13 goals in the league, he scored three times in the cup.
Sir Alex made a personal check on Kagawa's form in the cup final against Bayern Munich in Berlin, where he netted the opening goal and dazzled in a convincing 5-2 win.
Kagawa is also one the star names in what is rated by many as the best ever Japan team. His full international debut was in a Kirin Cup match against Ivory Coast in 2008 but he missed out on a place in the World Cup squad two years later.
He scored on his home debut against Fulham in August 2012 and, after a knee injury ruled him out for two months between October and December, he returned to net a memorable hat-trick against Norwich and finished his debut season in England with six