A leading Japanese DPJ -politician Yoshito Sengoku warns that "No nuke plant restart would mean mass suicide of Japan".
Links: EX-SKF: http://ex-skf.blogspot.com/2012/04/japans-djp-politician-no-nuke-plant.html
In a situation where all but one of the Japanese nuclear reactors are already out of service and the economic growth is still positive for Japan, threathening with a national catastrophe when closing down the last reactor seems quite odd to me. But the similar "Danger" for the whole economy collapsing without nuclear power is painted on the political canvas of Finland when someone suggests closing down our nuclear power plants or demands changes to our policy of building new reactors.
Fear-mongering is often connected to anti-nuke activists when they warn about the dangers of nuclear accidents or low level radiation but I feel that term to be more relevant when speaking about cheer leaders of nuclear industry, like Mr. Sengoku in Japan or Mr. Mika Seitovirta of Outokumpu Steel Company in Finland.
Most propably nothing catastrophical will happen when the last of Japanese nuclear reactors goes idling in the beginning of May this year. And no crisis will occur when Olkiluoto3 and Fennovoima -nuclear plants will not be built or finished in Finland. The electrical capacity needed will be built in alternative - and better - ways. We'll see!
By the way:
The japanese Government made 2011 some calculations how the nation would survive without nuclear power - and it will! The study made for the government showed 6 % overproduction of electricity in worst case scenario (summer 2012 would be the hottiest summer of history, record many conventional power plants would be halted for service at the same time - and no nuclear power would be available!)
(Sorry about the source - Mainichi web page - had been made unavailable recently. So I can't provide a working link for this study any more!)