https://www.tsunami.gov/?p=PHEB/2025/12/08/25342050/2/WEPA40
Shouldn't be too bad; USGS forecasts up to 1 meter tsunami.
1 meter is bad. That's a lot of water full of things you don't want slamming into you or any structure. Then it comes back full of even worse things.
Nhk has some more information - looks like the areas hardest hit will have been hit by now, with 3m high waves:
https://www3.nhk.or.jp/nhkworld/en/news/weather-disaster/tsu...