Kagoshima Earthquake Today: 5.9 Magnitude Quake Shakes Southern Japan 5.9 Magnitude Earthquake Shakes Kagoshima Region A 5.9 magnitude earthquake struck Japan’s Kagoshima region on Wednesday, May 20, 2026, making “Kagoshima earthquake today” a major search topic as officials confirmed that no tsunami warning was issued. The quake was reported near Okinawa Main Island