Workers were evacuated from Japan's Fukushima Daiichi nuclear plant as a precaution, though no abnormalities or damage were reported at the facility.
The Japan Meteorological Agency upgraded its tsunami warning, anticipating waves up to three metres, with the threat potentially lasting more than a day.
Waves up to 50cm were reported along Japan's Pacific coast, leading Japanese Prime Minister Shigeru Ishiba to urge evacuations to higher ground.
The US Tsunami Warning System also issued alerts for hazardous waves across various regions, with a US president confirming a tsunami warning for Hawaii.