Brian, I looked at your link, and I'd say that the 3 quakes you noted were within the rupture area. Near the edge, but within the rectangle with meters of slip. I'd be more concerned with the M5.3 at 68 km depth NE of, but close to (35 km), Tokyo. As we both posted a few weeks ago, there have been a few of these quakes over the last couple months.
Chris