Is it dangerous to eat a mutated eggplant descended from a radioactive ancestor?
While it's always possible that a mutated eggplant will produce a new toxin, this is very unlikely. I don't know how much higher the mutation rate is near Fukushima than in general but the difference can't be huge. Even if it's, say, 5 or 10 times higher than normal (I'm making up these numbers), the risk is still tiny. Actually, plant breeders sometimes use radiation to produce more variety to work with and we don't worry about that.