Japan’s Nuclear Reactors Remain Offline 4 Years After Fukushima Meltdown

Japan's Prime Minister Shinzo Abe attends the national memorial service for the victims of the March 11, 2011 earthquake and tsunami, in Tokyo, March 11, 2015.

People offer prayers for the victims of the 2011 earthquake and tsunami as they observe a moment of silence at 2:46 p.m. when a magnitude 9.0 earthquake struck off Japan's northeastern coast four years ago, at Ginza shopping district in Tokyo, March 11, 2015.

In this March 6, 2015 photo, some objects from the March 11, 2011 tsunami remain in Rikuzentakata, Iwate Prefecture, northeastern Japan.

Japan's national flag flies at half-staff to mourn victims of the March 11, 2011 earthquake and tsunami, at the Parliament building in Tokyo, March 11, 2015.