Neil Lennon confirmed that the 24-year-old has been watched and efforts will be made to get him to Scotland. Yamada, a small, goalscoring playmaker, plays for Jubilo Iwata and broke into his national team this year.
"He can play left side or off the striker," said the Celtic manager. "He looks okay, but we'll not have a real idea until we've seen him over here. I don't think there would be any money involved."
Lennon intends to sign one or two players in January and has been at Huddersfield Town's last two matches to watch striker James Vaughan, although he said there were also other potential targets involved in the games against Burnley and Bolton Wanderers. "I know we've been linked with Vaughan," said Lennon. "He is on a list of potential targets but there are others who caught the eye as well."