Jacinda Ardern opens up on what was covered during talks with Shinzo Abe

Prime Minister Jacinda Ardern has opened up on what she covered during a meeting with Japan's Prime Minister Shinzo Abe.

She's in Japan in advance of the opening of the Rugby World Cup before heading to New York next week for the United Nations General Assembly.

Ardern told reporters after meeting Abe it makes sense to focus more on strategic relationships, in this current environment.

"Seeing New Zealand acknowledging that we've experienced attacks from other state actors, this is about making sure that we work together as a region, share information, knowledge and know-how."

She also broached the idea of women's representation in Parliament with her Japanese counterpart, who she said was eager to try and get more women involved.

"Making politics an easier place to be and balancing all of the different demands as a politician and often as a carer, which of course so many women in the field of politics are."

Ardern will leave Japan on September 22 to head to New York, before making her way back to New Zealand on September 28. Winston Peters is currently Acting Prime Minister.