The Fukushima meltdown was the world's worst nuclear accident since Chernobyl in 1986. Around 18,500 people died or disappeared in the quake and tsunami.
https://www.bbc.co.uk/news/world-asia-45423575
ref - https://science.slashdot.org/story/18/09/06/0015212/japan-confirms-first-radiation-linked-death-out-of-fukushima
https://www.bbc.co.uk/news/world-asia-45423575
ref - https://science.slashdot.org/story/18/09/06/0015212/japan-confirms-first-radiation-linked-death-out-of-fukushima