The Japan international rejoined Bundesliga outfit Borussia Dortmund on deadline-day after two unsuccessful seasons with the Manchester club.
“I want to achieve success with this club again, and with no other.
“Only facts matter in football, stats, goals, assists, titles, and a lot was missing in this regard.
“That was probably why they no longer included me in their plans.
“Everybody knows that my second year at Manchester United was particularly difficult.
“The manager did not really count on me, and the team was also on a bad run.
“That means I am all the more delighted to be back. My heart had remained at Borussia Dortmund anyway.”