Japanese public broadcaster NHK TV warned torrents of water could reach as high as 5 metres (16.5 feet) and urged people to flee to high land or the top of a nearby building as quickly as possible.
The Japan Meteorological Agency has issued tsunami warnings for the coastal prefectures of Ishikawa, Niigata and Toyama.
Japan earthquake: The quake, which struck on New Year's Day, was felt in Tokyo and across the Kanto area. Reports of damage were not immediately available.
The advisory, the second-lowest of a four-stage warning system, asks people on islands in the Izu chain, which stretches south from the Tokyo region on the main Japanese island of Honshu, to stay away from coasts and river mouths.
The Japan Meteorological Agency said the quake struck 60 kilometers (36 miles) below the sea.
The quake logged four in some parts of Ibaraki and Fukushima prefectures on the Japanese seismic intensity scale which peaks at seven.
However, there was no threat of a tsunami and no major property damage reported, according to the weather agency and local authorities.
According to the Japan Meteorological Agency (JMA), the temblor occurred at 11.24 a.m., with its epicentre at a latitude of 37.6 degrees north and a longitude of 141.7 degrees east, and at depth of 60 km, reports Xinhua news agency.
According to the Japan Meteorological Agency (JMA), the temblor occurred at around 11.16 a.m. (local time).
An earthquake measuring 6.0 on the Richter scale struck off Japan's Fukushima prefecture on Friday, according to authorities.
The Japan Meteorological Agency said the quake measured 6.6 and hit at a depth of 60 kilometers (36 miles).
Japan on Saturday experienced a strong earthquake that shook buildings in the capital, Tokyo. The U.S. Geological Survey put the strength at magnitude 7.2. USGS said the quake was centered 34 kilometers (21 miles) east of Ishinomaki at a depth of 60 kilometers (37 miles).
At least 30 people were injured after a massive earthquake measuring 7.3 on the Richter scale struck Japan's Fukushima prefecture, authorities said on Sunday.
The quake was also felt in the capital Tokyo where an intensity scale of 4 was logged, with many reporting that their houses and furniture underwent strong shaking and some saying they felt dizzy because of the quake.
The earthquake logged 4 on the Japanese seismic intensity scale which peaks at 7 in some areas of Ibaraki and was also felt in some parts of Tochigi and Chiba prefectures.
Japan Earthquake, Tsunami prediction: A government panel in Japan has predicted a strong earthquake and tsunami in the country. The warning, made by a group of experts, is based on a "worst-case scenario". Here are the areas that could be worst-affected.
An earthquake measuring 6.9 on the Richter scale on Saturday struck off the west coast of Japan's Ogasawara Islands.
An earthquake measuring 6.1-magnitude jolted 169 km northwest of Naze, Japan, at 00:57:43 GMT on Saturday, the US Geological Survey said.
In 2011, Japan was hit by a 9.0 magnitude earthquake triggering powerful tsunami waves that caused rampant damage to properties, affecting operations massively in industries and leading to heavy casualties.
Japan's meteorological agency said the quake caused moderately strong shaking in nearby areas.
Top News
Latest News
