A magnitude 5.5 earthquake hit the Japanese capital and its vicinity on Monday morning, registering 4 on the Japanese seismic intensity scale of 7 in central Tokyo.

No tsunami warning was issued after the 9:11 a.m. quake, the focus of which was estimated at a depth of 60 kilometers off Chiba Prefecture, according to the Meteorological Agency.

No abnormalities were reported at Japan Atomic Power Co.'s idled Tokai No. 2 Power Station in the village of Tokai, Ibaraki Prefecture.

Shinkansen services were briefly suspended between Tokyo and Odawara stations, according to Central Japan Railway Co.