TOMIOKA, Fukushima Prefecture--Cherry blossom trees are in full bloom in an area that is still partly a no-go zone due to the triple meltdown at the nearby Fukushima No. 1 nuclear power plant.

That’s because there are more than 30,000 sakura trees on the slopes of Mount Yoshino, making for one of the largest concentrations of cherry blossoms to be found anywhere in the country when they ...