An earthquake struck off Japan's northeastern coast on April 20, 2026, at around 4:53 p.m. local time, prompting the Japan Meteorological Agency to issue tsunami warnings for Hokkaido, Aomori, and Iwate prefectures with potential waves up to 3 meters. An 80-centimeter tsunami was observed near Kuji port in Iwate, and evacuations were urged amid suspensions of Shinkansen services. Magnitude reports remain disputed between 7.4 and 7.5.