By ESPNSTAR.com staff
On Tuesday, United confirmed they had "reached an agreement" to buy Kagawa from Borussia Dortmund.
The deal is subject to a medical and work permit, but is expected to go through without a hitch by the end of the month.
Kagawa is currently on international duty with Japan and has so far refused to be distracted from his national team duties.
However, while Kagawa does his best to avoid talking too much on the topic of United, his international team-mates are more than happy to address the news which has made waves across traditional and digital media.
"For our generation, a Japanese player going overseas and joining a big club was something you'd only see in a comic book," Japan skipper Makoto Hasebe told reporters.
"Shinji's giving kids something to dream about. It's incredibly big, what he's doing."
Kagawa will not be the first Japanese player to ply his trade in the Barclays Premier League. Familiar names in Asian football like Junichi Inamoto (Arsenal and Fulham) and Hidetoshi Nakata (Bolton) both had their time in England while current Arsenal starlet Ryo Miyaichi ended the season with rave reviews following his loan spell at Bolton.
Watch: Kagawa moving to Man United.. More Videos
"He can absolutely play well there, and as Japan's number 10 I think he'll be a major part of the [United] team," Miyaichi said.
"But first I have to earn my appearances [at Arsenal]. I'm looking forward to playing against him."
The 23-year-old Kagawa will be the first Japanese player at Old Trafford where United have in the past also fielded players from South Korea and China.
Manchester United were recently named as the world's most popular club with 659million followers worldwide by market research agency Kantar.
According to the survey done by Kantar, almost half (325million) of United's support comes from Asia.