No doubt you have seen the headline, Nuclear power in Germany: The reasons behind Chancellor Merkel's U-turn. Germany has decided to completely forsake nuclear power generation, even shuttering existing facilities.
The Japanese government is understandably introspective on their previous decisions to expand nuclear power generation. Because of the shock caused by the Fukushima meltdown, decisions may be reversed in Japan, but I anticipate that nation's decisions to be more economic than political as in Germany.
A next-door neighbor to Germany, France produces over 80 percent of its electricity from nuclear power plants and has displayed no second thoughts after Fukushima. So why the difference in public acceptance? I suspect that Germany has endured more environmental cleanup than any of the other western nations as it integrated Eastern Germany back into its singular identity. The Soviet empire was notoriously unproductive, and too compensate, concern and respect for the environment was abandoned in its Cold War competition. Germany also inherited two Soviet-constructed nuclear power plants which increased concerns about nuclear safety in the country.
Germany is slightly smaller in land area than the State of Montana. What may be effective for the European countries, does not scale for larger countries such as the U.S., Canada, Russia, Australia, Brazil, China, or India. Germany doesn't need airplanes for travel between cities, unlike the larger countries. Their energy needs are lower and perhaps can be supplied by a patchwork of alternative energy sources, including coal.
Just as an outdoor barbecue grill makes sense for a suburbanite, and not for penthouse dweller, nuclear power must still be a preferred source of energy for the U.S.