The quake hit in the Pacific Ocean more than 100 miles east of Fukushima Prefecture.
It had a depth of about 6 miles, hitting at 4:59 p.m. local Japanese time.
The Japan Meteorological Agency has not issued any tsunami warnings.
It comes after several major earthquakes struck along the Pacific “Ring of Fire” in the past month or so.
Last Friday, a magnitude-5.7 earthquake hit off the coast of Northern California. Several large earthquakes hit Papua New Guinea, Indonesia, Vanuatu, Japan, and New Zealand last week.
The “Ring of Fire” is located within the basin of the Pacific Ocean, lined with 452 volcanoes, making up around 75 percent of the world’s total active volcanoes.
About 90 percent of the world’s earthquakes strike along the “Ring of Fire,” according to the USGS.
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