"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.