"My condition is not the top," he said.
"I am behind because the Italian league was not due to start until the end of August, so I came here not having done much training. I needed some time. I know that, so it's OK.
"Now I am getting used to it and I am starting to enjoy playing here. I'm still not satisfied. I think I can do more for the team. I need to improve more.
"I know what I can do and I think he knows what I can do, otherwise he would not have got me here," he said.
"The system is not difficult, I just have to run a lot and I need to know the way the other players play and they have to know me as well, which is something you cannot understand just in training, you have to play together in the match. That is why I need more games."
Bolton boss Sam Allardyce admits he is excited to see Hide Nakata and Jay-Jay Okocha in tandem.
"It looks like we've found a player (Nakata) with cutting edge qualities and with the passing ability of Jay Jay," the manager said.
"To have the two of them together performing in the same side is going to be really something.
"Jay Jay is not quite as good as we know he can be at the moment, but when he does get up to speed and does start showing his skills, these two are going to be awesome for us."