A powerful earthquake measuring magnitude of 8.9 hit Japan's east coast of Honshu island at 2:46 p.m. (05:46 GMT) Friday, according to the U.S. Geological Survey (USGS).

A screenshot of the USGS webpage about the earthquake [China.org.cn]

The quake is felt in almost all areas in Japan's pacific coast, including Tokyo and Osaka. Numerous people reported injured and Black smoke was seen rising from building in Tokyo's Odaiba waterfront area, Kyodo news agency quoted police as reporting.

The powerful quake struck 382 kilometer northeast of Tokyo with depth of 10 kilometers under the seabed.

Japan has issued a six-meter tsunami warning and the Pacific Tsunami Warning Center in Hawaii said a tsunami warning was in effect for Japan, Russia, Marcus Island and the Northern Marianas.

A tsunami watch has been issued for Guam, China's Taiwan, the Philippines, Indonesia and U.S. state of Hawaii.