The Japanese international, who signed for the Reds from German champions Borussia Dortmund last summer, spoke exclusively to United Review ahead of Southampton's visit to Manchester on Wednesday night.
"I’m in a fantastic environment, training every day with top players," he said. "At the same time, being with a big club like Manchester United, I know we are always expected to win trophies, which I haven’t accomplished yet.
"I love playing at Old Trafford, though, and I’m always amazed by the atmosphere of the stadium.
"We’ve managed many come-from-behind wins this season, which is very difficult. But if we go 1-0 down and then equalise, the feeling of unity between the supporters and players is incredible.
"Those moments encourage the players and make us feel like we can score another goal at any time."
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