The only time when a human being (including yourself) or any other living organism stops killing other living organisms on this planet is after they die. It doesn't matter what you eat or do. Even by breathing, you kill thousands of living organisms.
Amusingly, once you die, you sustain life for other organisms (for the maggots and the microscopic organisms that feed on your corpse and as fertilizer for plants).
So if you are strongly against killing of living organisms, you need to drop dead to make any meaningful contribution in that direction. :rofl:
That aside, every living organism is treated as a natural resource by humans and used as such regardless of whether you like it or not. You may argue that a human has no right to do that and you may be true, but still as long as the humans have the power to do it, they will. It holds for any other organism that's in the same position as humans.
So at the least, making efficient use of our resources and not being wasteful about it is good enough for me. In that respect, Japanese make very efficient use their living resources. If they kill an animal for food, they do not throw away a lot of the internals like Europeans, Americans or even us Indians do. They do not kill a Rhino or an elephant just for the Ivory. They make use of everything that can be put to use by humans. Fishing is their primary source of food as well as many other needs and any make very efficient use of it. In that aspect they are far better off than any of the rest of the world.