Tsunami hits north-eastern Japan after massive quake
Japanese television showed cars, ships and even buildings being swept away by a vast wall of water after the 8.9-magnitude earthquake.
The quake has sparked fires in several areas including Tokyo, and numerous casualties are feared.
It struck about 250 miles (400km) from the capital at a depth of 20 miles. There have been powerful aftershocks.
The tremor hit at 1446 local time (0546 GMT). Seismologists say it is one of the largest earthquakes to hit Japan for many years.
The tsunami warning was extended to the Philippines, Indonesia, Taiwan, the Pacific coast of Russia and Hawaii.
The Pacific Tsunami Warning Center said the wave could extend as far as Chile.
Tsunami waves hit Japan's Miyagi and Fukushima prefectures, officials said, damaging dozens of coastal communities.
Japan's NHK television showed a massive surge of debris-filled water sweeping away buildings, cars and ships and reaching far inland.
Motorists could be seen trying to speed away from the wall of water.
Farmland around the coastal city of Sendai was submerged and the waves pushed cars across the runway of the city's airport; Kazinform cites BBC News.
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