Nakamura will work hard for Celts

Shunsuke Nakamura could return to Japan at the end of the season

Celtic's Japanese midfielder Shunsuke Nakamura has admitted that the club's heavy schedule is taking its toll.

Nakamura has been linked with a return to former club Yokohama, but has vowed to play through the pain barrier as his club chase a domestic treble.

The 30-year-old has been suffering from knee and groin problems, but has declared himself ready for the weekend visit to Aberdeen.

"Celtic are fighting for the title, so I can't rest," he said.

However, the Japan international has also made himself available for his country's World Cup qualifier against Australia in Yokohama on 11 February - only four days before the next Old Firm derby.

"My groin injury is not too painful. It would be better to have a week in Japan to prepare, but there's nothing I can do about it," he added.

"It's exhausting to think about all the games for Celtic coming up before that.

"I'm only human and it's tough. I'm trying not to think about it.

"When you reach 30 you often get pain in the knees and ligaments.

"It's better to go to Japan with a positive attitude. It takes up a lot of energy, but I want to play."

Celtic meanwhile, are said to be chasing £3m-rated Croatian midfielder Anas Sharbini.

The NK Rijeka player is a regular under-21 international and has scored 16 goals in 52 appearances for the Dalmatian club.

Dynamo Kyiv failed in a £4m bid for the player last season, but Rijeka look set to drop their asking price as Sharbini wants to leave.

"Celtic are a big club and their interest is flattering," said Sharbini.

"I certainly feel it would be a great move for me at this stage in my career."