Initial reports pegged this at Magnitude 6 but the latest from NHK puts it at 7.3, which could cause some real damage.
A 7.1 magnitude earthquake in a similar region last year left at least 1 person dead and 186 injured along with damages in excess of $1.3.
The 2011 Fukushima disaster came after a 9.0 magnitude quake.
There are reported power outages in parts of Tokyo.
