Check out these blinky, multi-colored orbs. Now, compare to this account of a fleet of orbs over nearby Tampa, not a new sighting but I've found it helpful to do more UFO comparisons of late. So, this is just one random stab at that.
Click the photo for a bigger version - the orb, some zooming around, are unmistakable! And quite similar to what we've been seeing in Japan.
Almost immediately I saw a a couple very bright spheres flying by my apartment. They were not far away at all, and looked to be spheres. Its hard to estimate distances, but I would guess they were less than a 1/4 mile away and were approximately 30-40 feet in diameter.