Prime Minister John Key says he would be "deeply disappointed" if Japan were to resume whaling in the Antarctic Ocean next year.
Japan is seeking international support for a revised programme it hopes will meet the conditions of hunting minke whales for scientific research purposes.
The new programme would aim to comply with an International Court of Justice ruling in March, which found that the number of whales that Japan killed did not justify its research claims.
The court action was taken by the Australian Government, and supported by New Zealand. Attorney-General Chris Finlayson gave evidence on behalf of New Zealand during the court case last year. The decision was 12 to 4 in Australia's favour.
Japan's Fisheries Agency wants to submit a revised programme to the International Whaling Commission's scientific committee later this year, which it hopes will address the problems cited by the court.