Isaacs adds impetus to Wales Sevens
Isaacs helped Paul John's side lift the 2009 World Cup Sevens trophy aftering beat New Zealand, Samoa and Argentina in the knock-out stages of the Dubai tournament and last represented Wales Sevens in 2010.
The only other change to the squad since the Dubai and Cape Town tournaments in December is uncapped wing Lloyd Lewis who shone for Wales Under-20 last season.
"Sevens did a lot for me at the start of my career and I'm excited to be involved again," said Isaacs. "It's been a long time since I was last involved but and it would be fantastic if we can be as successful now as during that period. There are players with a lot more experience than me in the squad now so I've been spending time getting up to speed and learning how sevens has evolved."
Wales Sevens head coach Gareth Williams added: "We have kept a consistent squad compared to Dubai and South Africa and we are working hard to improve all the time. After Dubai, we made significant progress in Cape Town with an inexperienced squad and felt we should have beaten the USA and Australia so we are not going to change everything, just try to improve everything we do.
"We know it's going to be a tough challenge against Argentina, Fiji and Japan – Argentina got to the Cup Final and Fiji won the Plate in South Africa – but we're looking forward to that. Tom will bring his significant experience to the squad while it's clear Lloyd has all the attributes to be an excellent sevens player. Hopefully he will enjoy the experience and have a chance to show his skills in these global competitions.”
Wales Sevens squad: Luke Treharne (captain), Sam Cross, Ben Roach, Luke Morgan, Lloyd Lewis, Jordan Williams, Adam Thomas, Owen Jenkins, Tom Isaacs, Kristian Phillips, Ethan Davies, Luke Crocker.
