Okazaki has made seven appearances for the Foxes so far, and he is trying to establish himself in Claudio Ranieri's starting line-up.
However, the 29-year-old admits that he is yet to hit top gear, with inconsistency plaguing his season so far.
"Personally, I feel that some of my performances have been good, while others haven't been as good as I would have liked," he said.
"Because the league is new to me it will take time to fully adapt. The most important thing is how we perform as a team."
Despite his modest outlook, Okazaki has largely impressed during his initial spell in England, with his work-rate particularly eye-catching.
The front-man is tireless in his running and seems to possess the physical attributes required to adapt to the Premier League.
At the moment his displays have been rather overshadowed by his strike partner Jamie Vardy, with the England international netting six times in the Premier League already.
As a result of Vardy's form, Okazaki has regularly been rotated, and he was substituted at half-time during the Foxes' most recent game against Arsenal, but he insists that he has no complaints about Ranieri's use of him so far.
"The manager sent a sub on for me because the others have scored more goals than me," he added.
"Of course I wanted to play the full 90 minutes, but I'm the one who has to make an obvious impact and change the manager's mind.
"However, even just 45 minutes playing against Arsenal was a real joy for me."