New Zealand has accused Japan of treating the whaling convention as "an industry cartel" during an international court battle against whaling.
Attorney-General Chris Finlayson appeared before the International Court of Justice in The Hague yesterday to present New Zealand's argument against Japan's whaling programme.
Australia initiated the court proceedings in 2010, alleging Japan has been carrying out commercial whaling in the Southern Ocean under the guise of a scientific whaling programme.
It alleges that is in breach of the International Convention for the Regulation of Whaling and other international obligations to preserve marine mammals and the ocean environment.
New Zealand is an intervenor in the case, which allowed Mr Finlayson to make a 90-minute submission to the court yesterday.