Research conducted by a team from Kumamoto has been cited in this article about the "Oishinbo" controversy:
"A team from Kumamoto Gakuen University led by Nakachi Shigeharu in Nov. 2012 investigated nose bleeding and other illness among the people living in Futaba-machi adjacent to Fukushima dai-ichi and Marumori-machi 60 km north west north of Fukushima dai-ichi, and compared the data to those for people living in Kinomoto-cho in Shiga prefecture 600 km west of Fukushima dai-ichi. The odds ratio of nose bleeding among the people living in Futaba- and Marumori-machi were 3.5 and 3.8, respectively. This indicates that nose bleeding incidence was significantly higher (by 3 to 4 times) in towns close to Fukushima Dai-ichi compared to that in a place far from it. Other symptoms including headache, dizziness, nausea and fatigue were also high among people living in Futaba-machi."