Naka said: "Koki is a really good player. He is one of the best crossers of the ball with his right foot. He has the ability to become an excellent talent but I didn't have anything to do with his move to Celtic.
"However, he did not ask me about Koki.
"I have spoken to Koki and told him about the city and the players at Celtic. I have also advised him about where to live and supermarkets that are here.
"Oh, and the weather. I have told him it is extremely cold here and he should bring warm clothes with him!"
