The originally-measured 7.3 quake has been downgraded to 6.9, which has still triggered a tsunami warning for the area of Honshu. There have been aftershocks around 5.1-4 as well.
I think a tsunami has been spotted and is incoming. This is going to be bad.
And backwash has already been spotted, per CNN.
Backwash adds to what will be the tsunami’s destructive power.
NHK Live feed:
Announcer on NHk is saying it has been revised again, now to 7.4 and depth revised to 25km.
Quake struck at 5:59am local time. They have the full day to deal with any damage in daylight.
First tsunami wave was 90cm. Have a tsunami warning out indicating possibility of a tsunami of more than 3 meters is still possible.