Voters have elected anti-nuclear governors in Kagoshima and Niigata prefectures in recent months. These elections can be considered referenda on nuclear power because that issue was the main focus of debate in both campaigns. The results have put Prime Minister Shinzo Abe — and his plans to rev up the country's fleet of nuclear reactors — behind the eight ball of public opinion and prefectural politics.

There will be a slew of gubernatorial elections in 2017 that will focus on nuclear energy, an issue where the Liberal Democratic Party is vulnerable because it was in charge when all of Japan's reactors were built and was arguably complicit in the culture of complacency and regulatory capture that compromised public safety. The LDP owns the Fukushima disaster and thus the shambolic cleanup further discredits Abe's party.

The media portrayed the victory of Ryuichi Yoneyama in Niigata over the "nuclear village" candidate, former construction ministry bureaucrat Tamio Mori as a major upset. Abe endorsed Mori, but his pro-nuclear advocacy proved his undoing. Mori toned down that message toward the end of his campaign but it was too late to fend off Yoneyama, who rode the wave of nuclear anxieties into office. He replaces another anti-nuclear governor who stymied Tepco's plans to restart reactors in the prefecture in the aftermath of the Fukushima debacle and revelations of slack safety practices.