* After the accident, Tomioka had of course been evacuated. In 2013 the town was partitioned into zones of various radioactivities. Southern Tomioka, where the annual levels were a pleasant 20 millisieverts and below, became a green sector, and hence relatively easy to visit. Fifteen hundred people used to live there. They were hardly in evidence now. The central district, formerly inhabited by 10,000, was now a yellow or “residence restriction zone, with annual doses estimated between 20 . . . and 50 millisieverts. Residents can visit this zone in the daytime, but cannot stay overnight.” Then, of course, there were the red zones; what would Fukushima be without them? Their levels exceeded 50 millis. To enforce all these delineations, the government had erected 128 barricades in Tomioka. I did not understand any of this at the time.