Japan’s Mount Shinmoedake, part of the Kirishima mountain range, erupted on Wednesday afternoon, spewing ash clouds into the sky. Authorities have warned of falling rocks and pyroclastic flows within a two-mile radius, advising residents to remain indoors. The eruption has heightened concerns over a potential "mega-disaster" — a term popularized by manga artist Ryo Tatsuki, who reportedly predicted a major catastrophe in June 2025. While the region had been on alert prior to the eruption, the risk level has now intensified. With nearly 900,000 people potentially affected, the Japanese authorities are on high alert.