Cork Constitution's Peter O'Mahony will lead the Ireland U20s into their first IRB Toshiba Junior World Championship match against Argentina in Nagoya on Friday (9am Irish time).
Centres Nevin Spence and Jonny Shiels and openside Brian O'Hara have made a big impression since the Six Nations to make their first appearances at this level.
The Irish forwards will have to withstand what is sure to be a ferocious onslaught from the Argentinian eight.
15- Ian Madigan (Blackrock College/Leinster)
14- David Kearney (Lansdowne/Leinster)
13 - Nevin Spence (Ballynahinch/Ulster)
12 - Jonny Shiels (QUB/Ulster)
11 - Michael Keating (Clontarf/Leinster)
10 - Ian McKinley (UCD/Leinster)
9- Matthew Healy (Lansdowne/Leinster)
1 - Paddy McAllister (Ballynahinch/Ulster)
2- Thomas Sexton (Old Belvedere/Leinster)
3 -Jack McGrath (St.Mary’s College/Leinster)
4-Ciaran Ruddock (Neath/Exiles)
5 -Mark Flanagan (UCD/Leinster)
6 -Dominic Ryan (Lansdowne/Leinster)
7-Brian O'Hara (U.L. Bohemians/Munster)
8-Peter O'Mahony (Cork Constitution/Munster) Captain
16-David McGregor (Ballynahinch/Ulster)
17-Adam Macklin (Belfast Harlequins/Ulster)
18-Joe Moran (Galwegians/Connacht)
19-David O'Callaghan (UCC/Munster)
20-Conor Murray (Garryowen/Munster)
21-Andrew Burke (Garryowen/Munster)
22-Eamonn Sheridan (Lansdowne/Leinster)
05 Jun - 17:00 Argentina v Ireland Mizuho Rugby Ground, Nagoya
05 Jun - 19:00 New Zealand v Uruguay Mizuho Rugby Ground, Nagoya
09 Jun - 17:00 Argentina v Uruguay Mizuho Rugby Ground, Nagoya
09 Jun - 19:00 Ireland v New Zealand Mizuho Rugby Ground, Nagoya
13 Jun - 13:00 Ireland v Uruguay Mizuho Rugby Ground, Nagoya
13 Jun - 15:00 Argentina v New Zealand Mizuho Rugby Ground, Nagoya.