It was centered in eastern Chiba prefecture – the neighboring prefecture to Tokyo. I live right near the border to Chiba. There it was a 5+ on the Japanese scale of 7. It was also shallow – about 10 km deep.
I don’t think there was any damage though.
But there have been 7 earthquakes so far today with magnitudes:
* 6.9 (this was up north)
* 6.1 (the close-by one just now)