Ireland will play Australia at Sydney's Allianz Stadium in their opening Nations Championship match this summer.
The two sides will square off in the inaugural staging of the tournament on July the 4th.
Eden Park in Auckland will stage the meeting with New Zealand on July the 18th, but the venue for the Japan fixture on July the 11th has yet to be confirmed.
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Italy have been dealt a major injury blow ahead of their Six Nations meeting with England.
Ange Capuozzo is expected to miss the rest of the tournament with a shoulder injury picked up playing against France at the weekend.
The Toulouse back has returned to his club for treatment.
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Italy host England in Rome on Saturday week.
