This is all from an AI-generated video released by Japan’s government to warn Tokyo’s 20 million residents what to expect if Mount Fuji, the breathtakingly beautiful volcano that looms over their city, ever erupts.

Piled-up ash could cause wooden houses with low loadbearing capacity to collapse, one expert previously warned.

The sky would be covered in black volcanic ash, and urban areas would be plunged into darkness, even during the day, the government added.

The economic loss from a Mount Fuji eruption is estimated to be up to 2.5 trillion yen ($26 billion).

Even a small amount of accumulated volcanic ash could stop trains from running, and if it rains, ash that accumulates to a depth of more than 3 centimeters (1.2 inches) could make roads impassable for vehicles.

Logistics would be disrupted, making it difficult to obtain essential goods, and power lines could be cut by the weight of the ash, leading to power outages.