On Friday, the mayor of Futaba, a ghost town of once upon a time 7,000 souls near Fukushima No. 1, told his staff that evacuees might not be able to return for 30 years. Or never, for the older generation. He spoke in Kazo, Saitama Prefecture, where the town’s government has settled. It was the first estimate of a timeframe. But it all depends on successful decontamination. And that has turned into a vicious corruption scandal.