Masao Yoshida, the former head of the Fukushima No. 1 plant, has esophageal cancer, Tokyo Electric Power Co. said Friday.
The cumulative amount of radiation Yoshida, 56, was exposed to since the nuclear crisis started in March was 70 millisieverts, Tepco said, adding it is unlikely his cancer is linked to the radioactive materials spewed by the plant’s crippled nuclear reactors.
The utility said no signs of esophageal cancer were detected during Yoshida’s regular medical checkup in autumn 2010.
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