Japan has again defended its whale research program, saying it will not be sidetracked by the anti-whaling campaign led by Greenpeace.
Greenpeace has been pursuing the Japanese whaling fleet in the Southern Ocean in the hope of stopping the kill.
In a media statement, Japan's research institute says Greenpeace has not stopped it from conducting its research.
It says the behaviour of the conservationists in the Southern Ocean is being documented and a report will be filed for Japan's Government.
It has again defended its research techniques, saying while some information can be obtained through non-lethal means, other information requires the sampling of internal organs.
Greenpeace says bad weather prevented any whales being caught yesterday, but expects the whaling to resume when the weather clears.
A sick crew member from the sighting ship, the Kaiko Maru, is recovering well in a Hobart hospital and will return to Japan soon.