Negotiating the Trans-Pacific Partnership is about balancing interests, Prime Minister Jacinda Ardern said today.

At next week's APEC Summit in Vietnam, Ardern hopes to begin negotiations on certain areas of the 11-nation agreement including to allow New Zealand to ban foreigners buying existing properties in New Zealand.

A Japanese foreign official says any move to renegotiate the deal could be the end of it altogether.

But Ardern evaded the question on Tuesday when asked if she'd be happy to carry the weight of responsibility if she pursues negotiations, saying it's about balancing resolution of the housing crisis with exporter interests.

"I don't see the two as mutually exclusive and that's what I'm focused on," she said.

There are also some remaining issues with Investor-State Dispute Settlement clauses that Ardern wants to see resolved and said most states had taken issue with those at some point, indicating that perhaps other countries might be interested in renegotiations.

Ardern will discuss the TPP with her Australian counterpart Malcolm Turnbull in Sydney on Sunday and also hopes to reach a consensus with NZ First and the Green Party before she heads to Vietnam.

"I want us to take a shared view into those negotiations and that's what I'm undertaking at present," she said.

She expects any final agreement to be brought back to New Zealand for discussions before any approval.

- NZ Newswire