A woman has appeared in the Manukau District Court on Wednesday charged with the murder of two children whose bodies were found in suitcases.
She entered no plea and was ordered reappear at the High Court in Auckland on December 14.
It can also now be reported the woman is the mother of the victims.
Through an interpreter, she asked to address the judge directly but after instruction from her lawyer, she did not.
Name suppression continues.
It's been less than 24 hours since the woman landed on New Zealand soil.
The bodies of the children were first discovered on August 11, in the Auckland suburb of Manurewa, by an unwitting family who purchased the suitcases as part of an online auction.
In September, South Korean police arrested a 42-year-old woman who was "hiding in an apartment" in the city of Ulsan.
The woman told Korean reporters as she was bundled into a car: "I didn't do it."
South Korea's Justice Ministry later received a request from New Zealand for her provisional arrest in connection with the death of the children.
In October, the ministry ruled there was "probably cause to suspect the person had committed the extraditable offence".
She was surrendered to three New Zealand Police officers at South Korea's Incheon International Airport earlier this week.
New evidence was also handed over.
"Significant pieces of evidence were secured and provided without any delays upon the request of New Zealand through Mutual Legal Assistance in Criminal Matters, while the suspect was being surrendered to New Zealand through extradition," a statement from the Korean Justice Ministry read.