The pufferfish filling nets in Fukushima are a delicacy that can kill if prepared the wrong way. But to a community devastated by a 2011 nuclear disaster, they are also a lifeline. In the 12 years since the meltdown at the Fukushima Daiichi plant, caused by a deadly tsunami in northeastern Japan, "there hasn't been much good news", according to fisherman Masahiro Ishibashi.