An earthquake with a preliminary magnitude of 5.4 jolted Chiba Prefecture, east of the Japanese capital, and was also felt in Tokyo's 23 wards on Thursday but no tsunami warning was issued, the weather agency said.The quake occurred at around 12:12 p.m. and registered 4 on the Japanese seismic intensity scale of 7 in the cities of Katsuura and Isumi in Chiba, according to the Japan Meteorological Agency.The temblor originated off the eastern coast of Chiba at a depth of around 50 kilometers.Related coverage:Debate on "dark tourism" looms over Japan's quake-hit Noto PeninsulaREAD FULL ARTICLE