The Reds on Wednesday left for their four-game tour that includes two fixtures against long-time partners Saitama Panasonic Wild Knights, before games against an Italy XV and Benetton in Treviso.
The exciting backline talent confirmed plans to return later this month in Italy from a serious foot and ankle injury suffered during July's U20 world championship.
The unpunished hip-drop tackle that sidelined Pritchard has since been specifically outlawed in revised World Rugby rules.
The 19-year-old won this year's Rugby Australia rookie of the year gong after lighting it up in 12 Super Rugby Pacific appearances.
A Wallabies call-up beckoned before injury struck and instead it was older brother Kadin, a centre for the ACT Brumbies, called into the squad after suspension and injury struck the Test side's midfield depth.
Eye-catching performances on tour, with the Wallabies nearby for Tests against England, Scotland and Wales this month, will have Pritchard quickly back on the radar ahead of next year's home Cup.
"I've been running the last two weeks, and hoping to progress a bit faster over the next two weeks and maybe catch a game towards the back end of it," he said before flying out.
"With them (the Reds' strength and conditioning team) coming along too it's only going to progress."
The Pritchard brothers had been courted by the incoming NRL franchise, the PNG Chiefs, while the Sydney Roosters were also interested in Treyvon.
But they both committed to Rugby Australia in July, with the younger Pritchard locked in until 2029.
"Rugby union ... it can take you anywhere," he said of his thought process.
"Boys from the Reds playing in Italy, some to France, England.
"That opportunity is so great, and such a big thing the game has to offer and something that persuaded me, kept me in the game."
Recruits Izaia Perese and Cadeyrn Neville as well as Wallabies contenders Matt Faessler, Aidan Ross, Zane Nonggorr and Tom Lynagh will all tour with a Reds side now coached by former Blues title-winning mentor Vern Cotter.
