Keith Earls has been passed fit for the World Cup with the IRFU confirming that all members of the squad named last Monday are set to travel to Japan.
The 31-man panel and management depart from Dublin on Wednesday.
Munster wing Earls, who has 78 caps, limped out of Saturday's game against Wales with a leg injury.
"It just seemed like his quad, whether it's a whack in the quad or just above the knee, he was uncomfortable," boss Joe Schmidt said afterwards.
Cian Healy failed a half-time Head Injury Assessment but the prop has also been cleared to travel.
Ireland open their Pool A campaign against Scotland in Yokohama on 22 September.
Great bit of news. We need this guy on the pitch, and with ball in hand as much as possible!!! https://t.co/QwDWrHYs5l— luke fitzgerald (@lukefitz11) September 9, 2019
Former Ireland captain Brian O'Driscoll outlined what it would be like for the players during the period between the squad being confirmed and departure.
"There's an excitement," he said at a Guinness event.
"There's a relief that comes after the game played on Saturday, that everyone came through relatively unscathed, hopefully.
"You have a day off to spend with your family and say goodbye. It's more difficult for players with young kids. When you look at the likes of Rory Best who has kids.
"It's difficult, potentially going away for a seven-week period. It's an important time, to be able to enjoy it with family.
"Then the excitement of getting on the plane, you don't take it for granted once you're selected in the squad, you've got to get through those last games.
"Then there's the excitement of travelling down there and settling into your new home for however long it's going to be."
Ireland RWC19 Squad:
Rory Best (Banbridge/Ulster) 120 caps CAPTAIN
Tadhg Beirne (Lansdowne/Munster) 8 caps
Jack Conan (Old Belvedere/Leinster) 16 caps
Sean Cronin (St Mary's College/Leinster) 70 caps
Tadhg Furlong (Clontarf/Leinster) 36 caps
Cian Healy (Clontarf/Leinster) 91 caps
Dave Kilcoyne (UL Bohemians/Munster) 31 caps
Iain Henderson (Queens University/Ulster) 48 caps
Jean Kleyn (Munster) 3 caps
Peter O’Mahony (Cork Constitution/Munster) 59 caps
Andrew Porter (UCD/Leinster) 18 caps
Rhys Ruddock (St Mary’s College/Leinster) 23 caps
James Ryan (UCD/Leinster) 19 caps
John Ryan (Cork Constitution/Munster) 20 caps
Niall Scannell (Dolphin/Munster) 16 caps
CJ Stander (Shannon/Munster) 33 caps
Josh van der Flier (UCD/Leinster) 19 caps
Bundee Aki (Galwegians/Connacht) 20 caps
Joey Carbery (Clontarf/Munster) 19 caps
Jack Carty (Buccaneers/Connacht) 7 caps
Andrew Conway (Garryowen/Munster) 15 caps
Keith Earls (Young Munster/Munster) 78 caps
Chris Farrell (Young Munster/Munster) 5 caps
Robbie Henshaw (Buccaneers/Leinster) 38 caps
Rob Kearney (UCD/Leinster) 92 caps
Jordan Larmour (St Mary’s College/Leinster) 16 caps
Luke McGrath (UCD/Leinster) 14 caps
Conor Murray (Garryowen/Munster) 74 caps
Garry Ringrose (UCD/Leinster) 24 caps
Jonathan Sexton (St Marys College/Leinster) 84 caps
Jacob Stockdale (Lurgan/Ulster) 20 caps
Ireland Rugby World Cup Fixtures 2019
IRELAND v Scotland
Yokohama Stadium, Sunday, 22 September, KO: 08.45 (Irish time)
IRELAND v Japan
Shizuoka Stadium Ecopa, Saturday, 28 September, KO: 08.15 (Irish time)
IRELAND v Russia
Misaki Stadium, Thursday, 3 October, KO: 11.15 (Irish time)
IRELAND v Samoa
Fukuoka Hakatanomi Stadium, Saturday, 12 October, KO: 11.45 (Irish time)