The 19 year old winger, who made nine first team appearances this season, is joined by club colleagues Henry Trinder, Dave Lewis, Dan Williams and Shaun Knight in Japan as the youngsters prepare for their first game of the competition against the hosts in Tokyo on Friday.
As the players nervously await the team announcement for the first game this morning,
Sharples admitted it has taken a while to get settled into the hotel after arriving in the country last Wednesday.
"The first few days were a bit weird because everyone was jet lagged and didn't know what to be at really. But now we've been here nearly a week it's starting to feel like home."
"There are a lot of Gloucester boys out on the trip but there's no Gloucester massive. Everyone is getting on really well - there's a good spirit in the squad."
Sharples sees the Japan trip as his opportunity to leave his mark on the England Under-20s after missing out on most of the recent Six Nations because he was needed by Gloucester.
While he admits playing for Gloucester was his priority - and he shot to prominence with a try in the win over Bath at Kingsholm - Sharples is also now looking forward to playing for his country.
"I was expecting to be playing for the Under-20s in the Six Nations, but that didn't happen because I was with Gloucester."
"I was in the squad last year too but didn't get any games because I was a year young. So I see this as a chance to make my mark. Motivation is not a problem. When you're going out to represent your country it's easy."
"We're just desperate to get going now. We've done the acclimatising and the training and the first game can't come around quickly enough."
After Japan on Friday, England have two more pool games against Scotland on Tuesday and Samoa on June 13.
But Sharples said the focus was only on the first game.
"We aren't getting too far ahead of ourselves."
The semi-finals are to be played on June 17 and the finals on June 21.
Charlie Sharples biog
Content courtesy of Gareth Butler, Gloucester Citizen.