Hi, joho,
I have three things to point out here:
First, the Japanese government (pro-whaling, as we all know) has insisted that everyone has to find out if whales are really "on the verge of extinction" or not. If yes, we can wait. If not, we can start. That's what they have been saying to IWC.
I also agree with this view. However, this explanation has been ignored at recent IWC meetings.
I don't know where you got the information, but as far as I heard, "survey" has not been done for a long time as nobody knows the current numbers of whales in the sea. But if whales are not many, we can wait! If not, let Japan start catching again.
Secondly, "other meats" on land is sometimes not as easy as catching whales, and I guess you have not seen any problem with it. Large-scale farmings of cattle or hogs often create serious environmental issues - it's pointed in several books.
I also have been to Greeley, Colorado - the main industry there is cattle production - and you know what?
The whole village stinks so badly because of wastes from feedlots. Cows are drenched in craps, and you can't open the windows of your hotel rooms for more than five minutes. The meatpackers and producers are just ruining a beautiful town with a terribly ****** smell. You can't do it in a small country like Japan.
Another example is a beef packer in Iowa - they explained to residents of town when they built a plant that all smells from the factory would be totally the same as cooking smells at home - but in fact, what has come instead are smells of blood, guts, inedible parts, wastes... I have been near to many meatpacking plants, and the smells are just intolerable.
Considering those as well, I think it's at least nice to have an "option" to eat whales in Japan as Japanese ancestors used to.
Last - you have not answered my view...
If farming whales is technically possible, it should be allowed - it seems your point is that whales are about to extinct so go for other meat.... then, farming whales would not run the species to extinction.