After a transfer he described as "intense", the Japan international trained with his new team-mates at Carrington last week and is now experiencing the fervour of fans in South Africa during the pre-season tour.
Ahead of the MTN Football Invitational against AmaZulu FC in Durban, Shinji told MUTV he was feeling settled at his new club, having already learned some English greetings.
"My team-mates all welcomed me very warmly and I'm enjoying every single day here," he said through an interpreter.
"This is a great club and I’m looking forward to playing. I have to prove myself on the pitch.
"I've joined the club but I've not shown my potential yet, so this is my first mission and I hope I can show all the supporters what I am able to do."