Sixteen of the 26-man group have appeared in the Guinness Premiership and there are eight survivors from the 2008 campaign when England were beaten in the final by New Zealand.

Flanker Calum Clark (Leeds Carnegie), hooker James Clark (London Irish), centre Luke Eves (Bristol Rugby), fly half Rob Miller (Newcastle Falcons), flanker/lock Courtney Lawes (Northampton Saints), wings Charlie Sharples (Gloucester Rugby) and Seb Stegmann (Harlequins), and scrum half Ben Youngs (Leicester Tigers) all bring previous Junior World Championship experience to England's bid for victory in Tokyo on June 21.

And one player earns a call-up from outside the 32-man Elite Player Squad drawn up in January. Harlequins wing George Lowe seized his opportunity with three tries in three RBS Under 20 Six Nations appearances to win his place on the plane to Japan.

Fourteen clubs are represented with Gloucester (five) and Harlequins (four) providing the largest contingent in the JWC squad selected by Mapletoft and fellow coach Martin Haag.

"This is an exciting squad to be involved with and we have the talent, experience and ambition in the group to mount a really strong challenge for the world title in Japan this summer," said Mapletoft.

"Everyone in the squad for this tournament has made an impact in the Premiership this season or on dual-registration with National League clubs and that made selecting a squad of 26 a very tough task. There were close calls and there will be some very disappointed players out there.

"We gave debuts to 26 players and used 37 in total during the Six Nations, and while that provided some challenges it gave us the chance to look closely at a lot of players and for the likes of George Lowe to take the chance that was on offer."

The second seeds start the tournament with Pool B games against hosts Japan on June 5 (7pm), Scotland on June 9 (5pm) and Samoa on June 13 (1pm), all at the Prince Chichibu Stadium in Tokyo. The semi-finals and finals are scheduled for June 17 and June 21.

England prepare with a warm-up game against Loughborough University on May 13, part of a week-long training camp in the Midlands, before departing for Japan on May 27.

England Under 20 Junior World Championship Squad

Forwards
Bob Baker (London Wasps)
Calum Clark (Leeds Carnegie)
James Clark (London Irish)
Carl Fearns (Sale Sharks)
James Gaskell (Sale Sharks)
Jamie George (Saracens)
Graham Kitchener (Worcester Warriors)
Shaun Knight (Gloucester Rugby)
Courtney Lawes (Northampton Saints)
Joe Marler (Harlequins)
Ben Moon (Exeter Chiefs)
Josh Ovens (Bath Rugby)
Dan Williams (Gloucester Rugby)
Chris York (Harlequins)

Backs
Tom Casson (Saracens)
Rory Clegg (Newcastle Falcons)
Luke Eves (Bristol Rugby)
Tom Homer London Irish)
Dave Lewis (Gloucester Rugby)
George Lowe (Harlequins)
Rob Miller (Newcastle Falcons)
Charlie Sharples (Gloucester Rugby)
Seb Stegmann (Harlequins)
Henry Trinder (Gloucester Rugby)
Greig Tonks (Leicester Tigers)
Ben Youngs (Leicester Tigers)