An earthquake with a magnitude of 5.2 jolted eastern and northeastern Japan, including metropolitan Tokyo, on Friday, injuring one man, the Meteorological Agency said.
The man was injured when a chandelier fell on his head in his home in Toride, Ibaraki Prefecture, prefectural officials said.
There were no other immediate reports of damage or injuries, and no tsunami warnings were issued.
The 11:42 a.m. quake did not affect nuclear facilities in Tokai, Ibaraki Prefecture, according to prefectural officials.
East Japan Railway Co. temporarily halted operations on the Tohoku Shinkansen Line between Omiya Station in Saitama Prefecture and Nasu-Shiobara Station in Tochigi Prefecture, and on the Joetsu Shinkansen Line between Omiya and Kumagaya stations in Saitama Prefecture, for safety checks.
Runways at Narita airport were briefly closed but reopened after nothing abnormal was found.
The quake registered 4 on the Japanese seismic intensity scale of 7 in parts of Ibaraki, Tochigi, Saitama and Chiba prefectures, and 3 in Tokyo, Kanagawa, Tochigi, Gunma, Saitama, Chiba and Fukushima prefectures, according to the agency.
The focus of the quake was 50 km underground in southern Ibaraki.
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