The Japan Rugby Football Union (JRFU) added they had sent a letter of intent to the International Rugby Board confirming the country's bid for both the 2015 and 2019 tournaments.

By submitting a letter of intent for both World Cups, Japan can keep the option open to bid for either, or both, in their final tender to the IRB next year.

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"We are bidding to host the Rugby World Cup not just for Japan but for Asia," said JRFU chairman Nobby Mashimo.

"Bringing the [tournament] to Japan and Asia will unlock the potential of rugby as a truly global sport."

The country lost out to New Zealand in the bidding for the 2011 World Cup.

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