It is a sad thing that is happening. The discover channel did a entire series on this I think it was called THE COVE and it documented these killings. I don't think anyone can change what a country does.
Good luck with your hub it will be a tear jerker for sure.
Unless your from Japan it is unlikely you have a chance of effecting political change that would in turn effect more respect for nature. You can write about it and express yourself but it would take many in Japan to effect any real change.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.