With the Rugby World Cup just six weeks away hosts Japan, who share Pool A with Ireland, will look to put the finishing touches to their preparations for the global showpiece when they face the United States in the Pacific Nations Cup in Suva on Saturday.
With both sides winning their first two games, Saturday's clash will determine the winner of the competition, which Japan won outright in 2011 and shared the trophy with Samoa in 2014.
Jamie Joseph's side scored a combined 10 tries and 75 points in wins over Fiji and Tonga, putting their Pacific Island opponents to the sword with the kind of attacking rugby they hope to reproduce at the 20 September to 2 November World Cup.
"We are doing very well with our preparations for the World Cup," captain Michael Leitch said after arriving in the Fijian capital earlier this week.
"We have been together (in camp) since February ... we last won the Pacific Nations Cup in 2011 and if we win this game it will be after eight years.
"But the bigger picture is to win in the World Cup so this is part of the process," added Leitch, who returned to the starting line-up against Tonga last weekend after shaking off a groin injury.
Coach Joseph, who missed the win over Tonga due to the death of his mother, has rung the changes for Saturday's match.
The front row remains intact but Leitch is the only other forward to keep his place, with Pieter Labuschagne and Henrik Tui joining him in the back row.
Uwe Helu and James Moore replace Luke Thompson and Wimpie van der Welt in the locks.
Fumiaki Tanaka returns at scrum-half after missing the opening two games with injury while Yu Tamura continues at fly-half, meaning he is the only No. 10 to get game time during the tournament.
Kenki Fukuoka, who scored against both Fiji and Tonga, starts on the wing in place of Lomano Lemeki.
The United States head into Saturday's clash looking for their first Pacific Nations Cup title, having rejoined the competition this year after a three-year absence.
The Eagles thrashed Canada in Colorado in their opening game before edging Samoa 13-10 with a last-minute AJ MacGinty penalty last weekend.
Coach Gary Gold has made eight changes from that game, including the selection of an all new back row.
Jamason Fa'anana Schultz makes his debut at number eight, alongside Malon Al-Jiboori and Hanco Germishuy.
Former Connacht man MacGinty, who scored all of the United States 19 points against Samoa, continues at 10 and is partnered by the experienced Shaun Davies, who comes in for Ruben de Haas at scrum-half.
Japan beat the United States 28-18 during their last meeting at the 2015 Rugby World Cup in England.