An embarrassing court ruling that halted Japan's Antarctic whaling will actually help Tokyo take whales in the name of science, a top whaling official said just a day after the prime minister vowed to press for commercial whaling.

The government's decades-old and disputed "scientific whaling" program suffered a blow in March when the International Court of Justice (ICJ), in a surprise ruling, ordered a halt to annual hunts in the Southern Ocean.

Though Japan abandoned its Antarctic hunt for this year, it immediately vowed to retool its research program with an eye to resuming it as early as the 2015-2016 season, and eventually to resume commercial whaling as well.