Remember: this is in the ecosystem. It directly affects every living thing in the region, including humans. People living there are getting fucked over just by existing there, and it is spreading outward with no possible means of containment. This goes far beyond just fish or some import drama with China, this is an ecological fucking nightmare.
And history has shown that humans are really bad at measuring the extent of ecological damage in general. In reality it's probably way worse.
Nuclear power is like skydiving. If getting it right every time isn't something you're committed to doing, then don't do it.
Great potential in it to save the world, equal potential to destroy the world. Add on capitalist profit chasing and you've tipped the scales.
Also I'd just like to say this because I don't think a lot of people know it: The meltdown was not because the tsunami hit the reactor. It didn't. It hit an unrelated power station that was powering the cooling system, a system that was already extremely controversial due to its completely un-failsafe design and reliance on an external, much more vulrnable power source. This was not an unavoidable act of god, this was completely preventable and a massive insult to injury in an already devastated region following the tsunami.
And to add Chernobyl wasn't due to a spontaneous failure, it was a deliberate shutting down of backup systems to test them by people who didn't plan it properly.