US military personnel and their families are seeking $2 billion in damages for illnesses they believe were caused by the nuclear plant's meltdown. They allege that the Tokyo Electric Power Company (TEPCO), the plant's operator, misrepresented the amount of radiation present when it accepted US military assistance to deal with the crisis.

Soldiers aboard the USS Ronald Reagan, which rerouted from Korea to assist after reactors at Fukushima went into meltdown in 2011, have filed a lawsuit against TEPCO in the District Court for the Southern District of California. So far, 24 people are claiming damages, but Paul Garner, a lawyer based in San Diego, California, who is representing the plaintiffs, says that the 70,000 US military personnel and families stationed in or near Japan at the time could be party to the suit if they wish.