Iwate Prefecture in northeastern Japan experienced multiple earthquakes on March 26, 2026, with the strongest registering a seismic intensity of 4 on Japan's scale. According to NHK, the most significant tremor occurred at 11:18 PM local time, while an earlier earthquake measuring seismic intensity 3 struck at 4:37 PM the same day. Authorities confirmed that neither earthquake posed a tsunami threat to coastal areas, though Livedoor News reported that slight sea level variations might occur along Japan's coastline. For foreign residents living in Japan, understanding the country's earthquake measurement system is essential. Japan uses a seismic intensity scale from 0 to 7, which differs from the magnitude scale commonly used in other countries. A seismic intensity of 4, as experienced in Iwate, indicates noticeable shaking that can rattle dishes and hanging objects, potentially causing some people to feel frightened. However, it typically does not result in significant structural damage to modern buildings constructed according to Japan's strict building codes. The occurrence of multiple earthquakes in a single day, while concerning to newcomers, is not unusual in Japan. The country sits on the Pacific Ring of Fire, where several tectonic plates meet, making seismic activity a regular part of life. Iwate Prefecture, located in the Tohoku region, has experienced significant earthquakes in the past, most notably during the devastating 2011 Great East Japan Earthquake and tsunami. Expats residing in or near Iwate should take this opportunity to review their earthquake preparedness plans. The Japan Meteorological Agency continuously monitors seismic activity and issues warnings through various channels, including television broadcasts, smartphone alerts, and dedicated apps. Foreign residents should ensure their mobile devices are configured to receive emergency alerts, which are typically broadcast in Japanese but increasingly include English translations. According to NHK's reports, the absence of tsunami warnings for these earthquakes is significant. Tsunami threats are determined by factors including earthquake magnitude, depth, and location. While these particular tremors did not generate dangerous waves, coastal residents should always remain vigilant and understand evacuation routes to higher ground. Livedoor News noted that minor sea level fluctuations might occur, which are normal following offshore seismic events and do not constitute a danger. Practical preparedness measures for expats include maintaining an emergency kit with at least three days' worth of water, non-perishable food, medications, important documents, and cash. Many municipalities offer multilingual disaster preparedness guides, and expats should familiarize themselves with their local ward office's resources. Knowing the location of designated evacuation centers and keeping a flashlight, portable radio, and extra batteries readily accessible are essential steps. Foreign residents should also understand basic earthquake safety procedures: drop, cover, and hold on during shaking; stay away from windows and heavy furniture; and if outdoors, move away from buildings, power lines, and other hazards. After an earthquake, check for injuries and damage, be prepared for aftershocks, and follow official guidance from local authorities. The recent seismic activity in Iwate serves as a reminder that earthquake preparedness is not optional for anyone living in Japan. While the country's advanced warning systems, strict building codes, and well-established emergency response protocols provide significant protection, individual preparedness remains crucial. Expats should view each earthquake, regardless of intensity, as an opportunity to review and improve their emergency plans. For the latest earthquake information and safety guidance in multiple languages, foreign residents can access the Japan Meteorological Agency's website, download the Safety Tips app developed for tourists and residents, or contact their local international center for assistance with disaster preparedness resources tailored to non-Japanese speakers.