While issuing a tsunami warning and advisories, the Japan Meteorological Agency has urged over 210,000 residents to move to high ground. It said a 3-meter tsunami may still hit the northeastern prefecture of Iwate.
Shortly before Saturday midnight, Amami was hit by a 1.2-meter tsunami, while a 1.1-meter tsunami was observed in Iwate Prefecture at 2:26 a.m. Sunday.
According to agencies, a small tsunami of less than 1 meter was observed across a wide area of the country’s Pacific coast from Hokkaido to Kyushu and Okinawa.

There were no immediate reports of injuries. (see YouTube video: https://youtu.be/OtZHMjL01Wo)

The Fire and Disaster Management Agency said at least 210,000 people in seven prefectures — Aomori, Iwate, Miyagi, Chiba, Kochi, Miyazaki, and Kagoshima — were asked to move from the seaside.

While quoting scientists on Sunday, the Japan Times said that the massive underwater volcanic eruption in Tonga was so powerful it was recorded around the world and triggered a tsunami that flooded Pacific coastlines from Japan to the United States.

Dramatic satellite images showed the long, rumbling eruption of the Hunga Tonga-Hunga Ha’apai volcano spew smoke and ash in the air, with a thunderous roar heard 10,000 kilometers  (6,000 miles) away in Alaska.

The U.S. Geological Survey recorded Saturday’s eruption as equivalent to a 5.8 magnitude earthquake at zero depth.

For more detail, please click on https://www.japantimes.co.jp/news/2022/01/16/national/japan-tsunami-tonga-volcano/

ACN