Shinji enjoyed a promising first campaign at Old Trafford, in which he featured both in an attacking central midfield role and on the left wing for the champions.
Some observers feel Kagawa will eventually establish himself behind a main striker, a position in which he was so effective for his former club Borussia Dortmund.
But Reds legend Neville, who is now a club ambassador and TV pundit, reckons incoming manager David Moyes will continue to deploy the midfielder in different areas.
The ex-captain told ManUtd.jp: “It was a stop-start season because he had some injuries and hasn’t settled into a definite position yet, which is something he is going to have to work out in the next 12 months.
“His best position is in a central role because that’s where he played for Dortmund, and he will feel he can influence the game the most there.
“But at times, earlier on in the season when he was off the front, he was a little bit lost. I preferred him on the left-hand side so he could watch the game from a different position.
“You can get the best out of players like Shinji by playing them in different positions. In Europe, maybe he will play off the front and in the Premier League on the left, but I don’t think he will be fixed in one position."
Neville believes Shinji offers something different to the United team and highlighted the