Shinji Kagawa and up to 15 of his Manchester United team-mates have the opportunity to impress new boss Louis van Gaal at the World Cup next month.
But the playmaker insists that is not his priority and his sole focus is on success with Japan at Brazil 2014.
"I think everyone knows I want to do well at the World Cup, and I'm sure everyone else does, too," the 25-year-old said at Japan's training camp.
"But I don't want to get my priorities mixed up here – the important thing is for Japan to win at the World Cup.
"I'm not using the World Cup as a place to showcase myself for [van Gaal]. I'll deal with that after this tournament is over."
Shinji, who was in and out of United’s starting line-up under David Moyes last season, has long been preparing for and looking forward to his first World Cup finals.
"I basically want to keep doing what I did at United," he said. "I made sure I got the work in after games I didn't play in.
"I know how to get myself into shape. I was able to stay motivated despite the year I had because I had the World Cup to look forward to."
Japan face Ivory Coast, Greece and Colombia in Group C.