The Japan Rugby Football Union on Friday indefinitely suspended Christian Loamanu after the Tonga native tested positive for marijuana.
Loamanu, a 22-year-old who played for Japan at the 2007 Rugby World Cup, had tested positive for cannabis after a random test last month but denied the charges. However, rugby authorities said he had tested positive again.
"On behalf of the Japan Rugby Football Union, I apologize to the entire rugby community for this unfortunate incident," said JRFU chairman Noboru Mashimo. "Prohibited substances have no place in the world of rugby."
In addition to being banned from Japan's national team, the fullback has also been suspended from playing for Toshiba in Japan's domestic rugby league.
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