No it's not, it's done simply to protect Japanese tastes for particular types of sea food. And you surely don't believe scientific research that is funded by the Japanese government on behalf of the whaling industry.
Although whales slaughtered and eaten by Japan are supposedly killed for "scientific research", the number that now gets killed is even greater than it was before.
Another thing, some schoolchildren get fed whale whether they like it or not; this is nothing but a method of getting them used to the idea of eating whale meat.
There is no morally justifiable reason for killing and or eating whales.