Prime Minister John Key said he will set out his concerns about human rights issues "pretty directly" when he has his formal meeting with Sri Lanka's President later today, but said overall the relationship between the two countries was improving.
Mr Key is due to meet with Mahinda Rajapaksa mid-afternoon (NZ time).
He said New Zealand's relationship with Sri Lanka was improving.
"We've had limited engagement here for a long period of time. A lot of New Zealanders used to come here, then when the civil war was at its height, very few came. It is changing and evolving, there are more opportunities opening up here. There is a lot happening here."
He said Sri Lanka would have to work to address the issues of human rights and reconciliation with the Tamil population, and he intended to ask what steps Sri Lanka would be taking.