Japan forward Shinji Okazaki is convinced he can succeed in the Premier League because the sky is the limit for his game.

"I don't see a limit to what I can do yet," the new Leicester City signing said on Monday, upon his return from England where he finalized his contract over the weekend. "I want to keep pushing myself without setting any limits.

"I know they'll expect instant results from me and that's what I'm looking to give them. It's a difficult league, but I really think I've got a chance. I've got 4½ seasons in Europe that I can bank on."

Okazaki joins the Foxes from Mainz, where he was the club's top scorer the last two seasons. He scored 15 goals in 2013-14, the most by a Japanese player in a single season in Europe's top leagues.

Okazaki signed a four-year deal with Leicester, which finished 14th last season to stave off relegation and will need the former Shimizu S-Pulse man to pay dividends.

The 29-year-old said playing in England has been "a dream" and while he is fully aware of the challenges the Premiership brings, hardship is what he needs to take the next step in his career.

"Rather than stay in the Bundesliga, I wanted to go a league I haven't been to," Okazaki said. "I found appealing the thought of playing for a team which I really didn't know anything about.

"I had a frustrating time at the World Cup and Asian Cup, so I want to push myself again by working in a tough environment. If I succeed then, it will give me great confidence."