Ireland's Auckland-born centre Bundee Aki won't play against the country of his birth after management decided against appealing his three-match ban for a high tackle against Samoa.
Aki was sent off for the hit on Ulupano Seuteni on Saturday and was later banned for three games, effectively ruling him out of the rest of the tournament.
That stands, after his team decided against appealing the decision, meaning he misses Saturday's match in Tokyo, and if Ireland win, a semi-final and potential final.
"The Ireland management will not appeal the sanction handed down to Bundee Aki," Irish Rugby said in a statement.
"We are disappointed with the outcome and believe that Bundee's time will be best served helping prepare the squad for its remaining World Cup fixtures."