"Radiation brain" was a pun that made the social media circuit after March 11, 2011, deriding people whose brains (nō) had become unduly contaminated with fears about radiation after the disaster at Tokyo Electric Power Company Holdings Inc.'s Fukushima No. 1 nuclear power plant. They had, people claimed, "radiation brains" (hoshanō), a kind of soft-minded hysteria that made them figures of fun but also figures of potential danger to society and the economy. Their lack of confidence in government regulation of foodstuffs, people argued, became the source of harmful rumors that hurt farmers and dairy producers in disaster-affected areas. Such citizens, usually mothers in charge of providing meals for their children, were reckless in their caution.
Aya Hirata Kimura, a sociologist and professor of women's studies at the University of Hawaii at Manoa, presents case studies of mothers with such anxieties and examines citizens grappling with post-Fukushima food safety concerns in "Radiation Brain Moms and Citizen Scientists: The Gender Politics of Food Contamination After Fukushima." Kimura does not make claims about the extent of actual dangers to the food supply, but she does argue that the reality of the post-disaster threat is far from certain. The government, in other words, may be right about the limited health risks posed by irradiated produce, dairy, and meat; but skepticism on the part of citizens is a rational, rather than a hysterical, response. She also examines the various constraints that made many citizens — mothers, in particular — turn to scientific activities such as running citizen radiation-measuring organizations rather than engaging in out-and-out criticism of government and industry responses to safety concerns.