A strong quake registering a preliminary magnitude of 6.3 struck western Japan early Saturday morning and caused at least 22 injuries, the Japan’s Kyodo News Agency reported. The 5:33 a.m. quake registered lower 6 on Japan’s seismic intensity scale of 7 on Awaji Island in Hyogo Prefecture. The quake originated near the island at a depth of around 15 kilometers, the Japanese Meteorological Agency said. No tsunami warning was issued.