Thank you for your concern! We did feel the earthquake this morning (our apartment shook a few times), and the big aftershock this afternoon (was actually sitting in the movie theatre waiting for 'Harry Potter and the Order of the Phoenix' to start when the theatre swayed slightly) but the epicentre was about 250 km northwest of Tokyo so it was far enough away that a little bit of shaking was all we got here.
Niigata, on the Japan Sea Coast, received the brunt of the 6.8 magnitude quake and watching the news this evening, there was quite a bit of damage and many people have evacuated. This same area had another 6.8 earthquake about 3 years ago as well, the deadliest since the 1995 one in Kobe that killed thousands.
Having never experienced a major quake, only minor tremors from time to time, you get kind of complacent. We do have an earthquake kit but we often don't think about it happening here. This is a reminder of just how fragile the land really is.
*Image from BBC News. Click on image for pictures of the earthquake from the BBC.