Following the strong quake, Japan Meteorological Agency said that there's no threat of Tsunami
A strong undersea earthquake of 6.4 magnitude struck southeast of Tokyo on Friday morning, the US Geological Survey (USGS) said. However, there were no reports of injuries or damage.
Japan Meteorological Agency measured the quake at a slightly higher than 6.5 magnitude, AFP reported. The agency added that there was no threat of Tsunami.
The shallow quake hit at 09:14 am (0014 GMT), about 150 kilometres (90 miles) east-southeast of Katsuura city. The epicentre was reported about 226 kms (138 miles) southeast of the Japanese capital, Tokyo, at a shallow depth of 10 km (6 miles), according to Reuters.
Japan's weather agency was quoted as saying by Reuters that there could be slight changes in the sea level.
Earlier in April, two strong quakes had struck southern Japan's Kumamoto prefecture followed by more than 1,700 aftershocks, and left at least 50 dead, AFP observed.
The international news agency further stressed in its report that Japan sits at the junction of four tectonic plates and experiences a number of relatively violent quakes every year. Rigid building codes, however, and their strict enforcement mean even strong tremors often do little damage.
(WION with inputs from agencies)