Usami became the latest in a long line of Asian players to ply their trade in Europe after Bayern secured his services on a year-long loan from Gamba Osaka, who have an option to make his move permanent should he sufficiently impress.
His arrival on German shores comes just a year after Kagawa himself was signed by Dortmund, and then went on to play a starring role as the club landed their first German Bundesliga title since 2002.
However, despite acknowledging that Kagawa has set an excellent example for himself - and other young Japanese footballers - to follow, Usami has pledged to put his duty to Bayern ahead of his friendship with his compatriot.
"Yes, he [Kagawa] has prevailed, played a great season and is a German champion," Usami said, according to SPOX.
"That's great for our country and our football. But I see Kagawa as a rival.
"He plays for Dortmund and I for Bayern - and we both want to win this season's German title.
"I want to achieve what Kagawa has reached."
Usami was not involved in Monday's 3-0 DFB-Pokal victory over Eintracht Braunschweig, but did get a chance to show what he was capable of in last week's Audi Cup, which included playing against Spanish and European champions Barcelona.
The nineteen-year-old did admit the Audi Cup, which also involved AC Milan and Internacional, had provided him an excellent opportunity to test himself against the world's top sides.
"The Audi Cup is a great tournament with very strong teams.
"Every player should be happy if he can compete with the best."
Understandably for a footballer coming from a proud footballing nation, Usami acknowledges there is huge pressure on him to succeed in Germany, but reveals he is unfazed by the watchful eyes.
"I like to be put under pressure. I'm playing for Bayern and I know that expectations are high on the players at such a great club.
"From Japan, I feel the joy and the pride of the people as there are more and more Japanese playing in Europe.
"You cannot compare the football in Japan with Europe and the top leagues. It's another level here [Germany] and I'm trying to adapt."
Usami, who is best deployed on the wings, faces a big task overthrowing the likes of Franck Ribery and Arjen Robben from the starting lineup.
Far from being threatened by their presence, Usami is looking forward to learning from two of Europe's best wingers.
"I can only learn from these players. And at Bayern, there are several good players in every position.
"I would like to acclimatise well in Munich, learn from other players and make my contribution to their success."
Usami has represented Japan at almost every youth-level and was called up to the senior squad for the recent Kirin Cup, but is yet to be handed his first senior cap.