Pool D captains, including Wales's Scott Andrews, at the Tokyo launch ahead of the tournament kick-off.
Ospreys academy and Aberavon back row Justin Tipuric will lead Wales Under 20 in their opening match of the IRB Junior World Championship, against Tonga in Saga tomorrow (Friday, 11am UK time).
Three players will earn their first Wales Under 20 caps in this game with uncapped trio Llanelli of full-back Daniel Newton, Carmarthen Quins centre Jason Harries and Glamorgan Wanderers scrum-half Lloyd Williams all earning their places in the starting line-up.
Two other uncapped players, Owen Evans of Llandovery and Jamie Davies of Carmarthen Quins, start on the bench.
Squad captain Scott Andrews, Dragons academy outside-half Dai Langdon and Cross Keys scrum half / wing James Leadbeater are unavailable for this game with minor injuries but should all be available for Wales' second game of the championship against Canada on Tuesday. Ospreys academy no 8 Rory Pitman goes straight into the starting line-up after joining up with the squad from New Zealand where he has been playing with Air New Zealand Cup side Taranaki
Wales head coach Phil Davies said, "The boys have worked extremely hard since we arrived in Japan at the end of last week. The new caps have all performed well in training and deserve their opportunity on the field tomorrow. We are confident in these players and hopeful this team will bring us a winning start to the tournament. However, we have five games over 16 days and therefore a 26-man effort is undoubtedly required in order to do well for Wales in this campaign. Rory (Pitman) is in great shape, he has trained well and fitted straight back into the group well, there is no doubt his time in New Zealand has helped him.
"Being in Japan is providing a new cultural experience for the players, alongside the rugby experience. We visited the Atomic Bomb Museum in Nagasaki this week, an unbelievable experience for the players and management."
Wales Under 20 v Tonga, Friday 5 June, 11am UK time (7pm local time):
Daniel Newton (Scarlets academy/ Llanelli); Jamie Loxton (Blues academy / Glamorgan Wanderers), Jason Harries (Carmarthen Quins), Ashley Beck (vice-captain, Ospreys academy / Aberavon), Nick Reynolds (Llanelli); Matthew Jarvis (Ospreys academy / Neath), Lloyd Williams (Blues academy / Glamorgan Wanderers); Aaron Coundley (Dragons academy /Ebbw Vale), Rhys Williams (Blues academy / Pontypridd), Simon Gardiner (Scarlets academy / Llanelli), James King (Ospreys academy / Aberavon), Ashley Sweet (Dragons academy / Cross Keys), Justin Tipuric (capt, Ospreys academy / Aberavon), Rhys Jenkins (Dragons academy / Ebbw Vale), Rory Pitman (Ospreys academy / Bridgend / Taranaki)
Replacements: Owen Evans (Llandovery), Craig Attwell (Dragons academy/ Newbridge), Josh Navidi (Blues academy / Glamorgan Wanderers), James Thomas (Dragons academy / Ebbw Vale), Rhys Downes (Blues academy / Pontypridd), Jamie Davies (Carmarthen Quins), Scott Williams (Scarlets academy / Llanelli), Dan Partridge (Cardiff)
Wales Pool D fixtures (all at Best Amenity Stadium, Saga):
Wales v Tonga, Friday 5 June
Wales v Canada, Tuesday 9 June
Wales v Australia, Saturday 13 June
The WRU's Women and Girls legacy events - #TRY OUR GAME have proved popular this week with current players and newcomers to the game learning new skills and picking up tips from national squad players.
We caught up with Shona and Ellie from the Wales women team ahead of the start of the Women's Rugby World Cup in Paris next month at a recent women's training session to encourage and promote more women and girls to try their hand at rugby. #tryourgame
The Women's Rugby World Cup warm-up clash between Wales and USA proved bittersweet for centre Elen Evans. Despite being one of the star performers on the day on her 50th Test appearance, USA edged home 10-7 at Cross Keys.
Wales completed their Junior World Championship campaign with a victory over Samoa. Team manager Mark Taylor and No 8 James Benjamin reflect on a tournament which saw Wales win three games and lose two.
Wales U20 players Angus O'Brien, Nicky Thomas and coach Richard Hodges are determined to finish their Junior World Championship with a flourish when they tackle the big hitting Samoans tomorrow in Auckland.