I'm feeling shakes every 20 minutes or so; one of the earthquake alerts on my phone actually preceded the shaking by about 10 seconds. My body's so used to the shaking that it always thinks it's shaking -- I set up a bottle of water to look at just so I don't go insane.
4:00 am JST, had a 30 second quake that bashed my head on the wall and woke me up.
Edit: I'm from seismically-inactive Pennsylvania and completely not used to this, even after four years. It took me a while to fall asleep the first time since I kept feeling like I was shaking and would jerk awake. Now I don't know if I should try to fall asleep again or what.
11:30 pm JST and I'm still feeling quakes.