Japan experienced two earthquakes, measuring magnitude 6.7 and 4.9, off its northern and eastern coasts, prompting the JMA to issue a tsunami advisory for up to one meter, though observed waves only reached 20 centimeters.This seismic activity followed a powerful magnitude-7.5 quake last week in the same region, which injured at least 33 people and caused minor infrastructure damage, including an evacuation order for a steel tower.Shinji Kiyomoto of the JMA urged public caution as nuclear facilities like Onagawa Nuclear Power Plant and Tomari Nuclear Power Plant reported no anomalies, while JR East confirmed Shinkansen delays.