The festival takes place ahead of September’s Rugby World Cup in Tokyo and other major Japanese cities.
The opportunity arose for Matthew and Joe due to the St Ambrose rugby team’s success, the team that they both play for.
Matthew is from Knutsford and Joe’s grandparents live in the town.
The reporters are following them round in Japan and there are daily updates on Twitter and Facebook. kids-rugby-fes.jp/?lang=en-GB