Well, that's cool, Pal. Japan's definitey on a whole other order of things, no question about that.
Of course, one would highly doubt the UN would be able to start declaring non-human species to be sapients, even if they wanted to. (Big issue right there: for starters, the word 'whales' covers a lot of ground,) Which doesn't, of course, mean that a certain amount of the general opposition to whaling doesn't come from *just* that sentiment/suspicion. It's frankly, not cause they're cuddly or something that people are real uncomfortable with the notion of treating these species like plain old resources, particularly to the point of risking extinction.
And you're not exactly talking to some Croakie-wearing Vegan here, of course. (It's kind of all about respect, in my view.) In fact, how I think even beef-cattle are best treated is very analagous: Norway's being a little more akin to 'traditional farming' than Japan's 'factory' operation in the guise of 'research.'
Not that hunting creatures to the brink of extinction is exactly great for your local whaling industry: ask a New Englander.