There is talk of the Japan international being played as a winger.
"I think the boss will be looking at where he does play him out there [on tour]," Robson told manutd.com. "He’s got a good option now and can play Javier Hernandez and Danny Welbeck up top but can also now play Wayne [Rooney] up there if he really wants to and Shinji can play in behind him.
"From what I’ve seen and been told about him, he can play in numerous positions and won’t let you down. He can do a good, hard, workmanlike job for you.
"Versatility has always been important for the boss. He has a few players who can play in different positions. Look at his last few signings – even at the back, Phil Jones and Chris Smalling can play centre-half or right-back. Phil can also fill in to midfield as well so the boss likes players who have got that flexibility where they can balance a team."