The Black Ferns have added a final hitout against Japan, before they kick off their Rugby World Cup campaign on home soil in October.
Under new coach Wayne Smith, New Zealand have played five games for five wins so far this year, as they rebuild from a devastating northern hemisphere tour - on and off the field - last year.
Their scratchy 22-14 win over Australia on Saturday was their last scheduled outing before the two sides meet again in their Rugby World Cup opener on October 8.
But NZ Rugby has confirmed an additional fixture against the 'Sakura Fifteen' on September 24, part of a doubleheader with the All Blacks v Wallabies Rugby Championship showdown.
The Japanese have also beaten Australia this year, edging them 12-10 at Gold Coast in May, but are currently ranked 13th in the world - the second-lowest among teams at the World Cup tournament, ahead of just Fiji.
"Adding another test to our schedule is important," said Smith. "The more we can train and play together, the better.
"Eden Park is a fantastic venue and getting the chance to play there before the World Cup is fantastic.
"We saw Japan beat Australia earlier this year, so know they are a team that is building. We are really grateful to have some strong opposition before we start the World Cup.
"Playing our first test against them at Eden Park will be a great occasion."
After demolishing the Wallaroos 52-5 seven days earlier, the Ferns had to battle back from an early yellow card to concussed midfielder Chelsea Semple and a converted try to Aussie winger Bienne Terita, before prevailing in the Adelaide rematch.
While Smith has tried to develop an expansive gameplan for his team, all three of their tries came from close-range forward pressure. The performance suggested the NZ women needed another run before the defence of their world crown.
"This test match is a tremendous opportunity for us and the invitation from New Zealand is testament to the progress the team has made since we first gathered in 2019," said Japan coach Lesley McKenzie.
"We’re looking forward to this opportunity to test ourselves against the world's best and we hope Japan will get behind us in this warm-up for Rugby World Cup."
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