Next question please (and an easier one too!)... 
My guess is that the was still in service due to high electricity demands throughout the country - it's replacement simply wasn't ready to go online.
There's talk now of rolling blackouts nationwide until at least April and at a guess I'd say there's likely to be a little less neon in Tokyo for some time to come after that.
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If it moves, shoot it, if not push it, if it still doesn't move, use explosives.
Nothing happens in isolation - it's called "the butterfly effect"
Mors ante pudorem
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