Well there is relevance. For instance Japan's balance of payments is affected to the tune of 100 million USD per day as they need to import more fossil fuels to compensate for the nuclear plants going off line.
That seems a bit unlikely, HH. Where did you get the number from? Japan imports its nuclear fuel too, doesn't it? And the cost of operating a nuclear reactor is broadly the same as operating a coal plant (in terms of fuel, manpower, maintenance etc). Even if there are some temporary short-term consequences (I'm sure there must be), they will be re-jigging things around the new way of doing things over the next few months and years. They will undoubtedly wind down their total consumption so that replacement of the reactor output is no longer needed. It's too early to say how this will pan out, but if anyone can make it work, the Japanese can.
Nuclear and renewables complement each other well, as nuclear can provide base load generation, something that people need to be familiar with as currently renewables cannot do this.
The entire concept of base load is an artifact of traditional generation methods. Coal and nuclear are either off, or they're on; you can't really crank them up and down, and for all sorts of reasons it's awkward to shut them down and start them up again. Therefore, the utility companies like to keep them running 24-7, and they offer customers incentives to make sure that happens. The global economy has been constructed around the needs and wants of the power companies! It will take some time to develop updated systems that work better with renewables, but "base load" really doesn't exist - at least not in the exaggerated form (~30%max) that it takes in "advanced countries".
It is cutting off your hand to spite your face shutting nuclear down when it is among the least damaging of technologies, especially in a stable and advanced and relatively peaceful place like Japan, and no I am not being ironic.
Depends what you mean by damaging. Yes, Japan is probably one of the few places in the world that stores its nuclear waste properly, but surely the point is, if you can do without it, then why not do so?
I think, in their particular case, their problem is pretty simple: they're massively overpopulated. Cheap, easy energy has just maintained the illusion that overpopulation is somehow sustainable.