An earthquake with a magnitude of 7.4 triggered a tsunami of up to 4.5 feet in Japan.
While in New Zealand a quake with a magnitude of 6.3 has hit the country little more than a week after a powerful tremor killed two on the South Island.
A tsunami of up to 4.5 feet (1.4 metres) has struck the coast of Japan, hitting the same region devastated by a massive earthquake, tsunami and nuclear disaster in 2011.
The tsunami hit the coast around Sendai, about 45 miles (70km) north of Fukushima, with smaller waves hitting ports elsewhere along the coast.
"We saw high waves but nothing that went over the tidal barriers," a man in the city of Iwaki told NTV television network, following the 7.4 magnitude earthquake.
The Pacific Tsunami Warning Center in Hawaii said the tsunami threat had now largely passed.
"Sea level fluctuations may continue along some coasts of Japan over the next few hours," it said.
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