The Japanese star joined United from Bundesliga side Borussia Dortmund last summer.
The 24-year-old made his first league start under David Moyes against West Brom on Saturday.
“I have to take this like some kind of message (from the manager),” he said.
“I need to improve more and more, or I cannot survive at this club.
“I have to take this in a positive way and keep trying to do my best.”
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As always it is the so called “big clubs” that have splashed the most cash in the transfer window so far this summer. Manchester United or City? Arsenal or Tottenham? Who are the winners and losers of the transfer window so far?
Being an amiable guy is good for you and Jurgen Klopp is living proof.