Two powerful earthquakes, with magnitudes of 6.9 and 7.1, struck Japan on Thursday, affecting the southwestern islands of Kyushu and Shikoku. Authorities have issued a tsunami warning for several regions, including Miyazaki, Kochi, Oita, Kagoshima, and Ehime prefectures. Public broadcaster NHK reported that 20-centimeter-high waves were already observed in Miyazaki. Officials are closely monitoring the situation to assess potential damage and risks.