The pair, who left Twickenham Stadium in February to begin their trip, handed the whistle to Welsh referee Nigel Owens, who will be taking charge of Friday's (Sept. 20) clash between hosts Japan and Russia.
The journey, which traversed 27 countries in 231 days, has aimed to raise awareness and money for charity ChildFund Pass it Back, which is working in partnership with World Rugby, looking to empower under-privileged children across Asia through the game.
They delivered the whistle safe and sound to Nigel Owens in Tokyo Stadium, which will host Friday's opening match. Nigel Owens was also the referee for the final of the 2015 Rugby World Cup in England.
The duo will now stay on in Japan for the next six weeks to enjoy the World Cup.