Ferguson is confident that his new acquisition will pick up the language quickly.
"He's got an opportunity to get to know the players on tour and acclimatise to the way we are," said the United manager.
"I'm sure he will improve his English - or Scottish - over next few months, whichever he finds easier. He won't understand my Scottish when I lose my temper anyway!"
And Kagawa agreed: "Language is very important to me," he said. "I'm very motivated to learn English; I hope I can learn it quickly so I can communicate with my team-mates very soon."