In Japan, the Sakurajima volcano erupts almost daily and threatens the 600,000 inhabitants that live at its feet. On the flanks of the volcano, every morning, children make their way to school with protective helmets.

The ash that accumulates in the village forces the inhabitants to perform a daily cleaning. But these ashes are also a source of benefits. Mr. Shirahama, a farmer, cultivates the largest radishes in the world. Meanwhile Japanese scientists monitor the volcanoes 24 hours a day.