The New Zealand Government has confirmed that it will take its case against Japanese whaling in the Southern Ocean to the International Court of Justice.
Foreign Affairs Minister Murray McCully says it has formally lodged an intervention before the court in the case brought by Australia.
Intervention is a procedure that enables a non-party to the case to put its legal views before the court.
Australia took its case to the International Court of Justice in 2010, questioning the validity of Japan's so-called "scientific" whaling programme.
Mr McCully says New Zealand has worked hard with Japan for more than three years to try to find a permanent solution to whaling in the Southern Ocean.
He says he is disappointed that New Zealand has had to pursue its interests in court because diplomatic initiatives have failed to bring about a end to the whaling.