Cika jumla mai zuwa: A ranar 12 ga Maris, 2011, bayan da
girgizar kasa da tsunami a arewa maso gabashin Japan, Kan ya tashi a cikin helikofta don lura da tashar wutar lantarki ta Fukushima I kuma ya shiga cikin kokarin da za a yi don magance bala'in nukiliya na Fukushima Daiichi. Naoto Kan ya ɗauki matsayin da ke ƙara ƙin nukiliya a cikin watanni bayan bala'in Fukushima. A watan Mayu, ya ba da umarnin a rufe tsohuwar tashar wutar lantarki ta Hamaoka saboda tsoron girgizar kasa da tsunami, kuma ya ce zai daskare shirin gina sabbin matattara.