Kagawa is asking for more time to adjust his style.
"To be honest, I don't believe I have yet cemented my place (in the team)," Kagawa told Kyodo News.
"There is not one game that I can be satisfied with the way I played over the 90 minutes. I still feel I need more time to adapt.
"It is fate for any player that plays for a big club and I am trying to draw on the positives."