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The Tokyo Metropolitan Government in Japan recently shared an AI-generated video to warn its residents about what would happen if Mount Fuji erupted without warning. After watching the video, if residents weren’t worried about Mount Fuji before – the volcano is currently not believed to be at risk of erupting anytime soon – they definitely should be now. Because it’s a pretty terrifying look at the devastation the volcano would cause if it did erupt.

“The moment may arrive without any warning,” the video warns. “If Mount Fuji erupted, volcanic ash may fall on Tokyo and impact us in a wide variety of ways.”

AI-generated video shows significant damage

In the video, which was created for Japan’s 2025 Volcanic Disaster Preparedness Day, massive clouds of volcanic ash and other debris are seen making their way from Mount Fuji, located 62 miles away, to the nation’s capital in less than two hours. Despite being far enough away from the volcano to avoid any damage caused by lava, the amount of volcanic ash that would hit the city could shut down the city’s transport networks and cut its power supplies.

“It only takes a minimal accumulation of ash on runways and rails to render planes and trains unusable,” the video states. “A small amount of ash on roads may impact the operation of 2WD [two-wheel drive] vehicles, as the ash fall limits visibility and increases the risk of slippage, creating hazardous driving conditions.”

The video adds, “Due to transportation paralysis, there is a possibility that some people will be unable to return and logistics will come to a halt, making it impossible to transport goods.”

On top of that, the ash from a Mount Fuji eruption could affect the city’s 37 million residents’ respiratory and eye health, clog drainage systems, pollute rivers, overwhelm water treatment centers, damage crops, snap power lines, and collapse wooden roofs.

Mount Fuji poses no current threat

But again, there is no imminent threat of any of this happening, according to government officials. It has been almost three decades since it’s happened.

“The simulation is designed to equip residents with accurate knowledge and preparedness measures they can take in case of an emergency,” they said in a statement reviewed by CNN.

As for the other 110 active volcanoes in the country? Well, you just never know.