An earthquake struck Fukushima and other northeastern Japanese prefectures early Saturday morning.
The quake occurred at about 4:22 AM Japan time.
The Meteorological Agency says the focus is 10 kilometers beneath the Pacific Ocean off Fukushima Prefecture.
The magnitude was estimated at 6.8.
The jolt measured 4 on Japan's seismic intensity scale of zero to 7.
The agency issued a tsunami advisory for Fukushima, Miyagi and Iwate prefectures.
The agency observed a 20 centimeter high tsunami at 5:19 AM in Ishinomaki City, Miyagi Prefecture but lifted its tsunami advisory about two hours later.
Tokyo Electric Power Company says there are no reports of irregularities at the Fukushima Dai-ichi Nuclear Power Plant that was crippled by a major earthquake and tsunami in 2011.
Jul. 11, 2014 - Updated 20:04 UTC