Originally posted by BeamishThe videographer says that it IS reclaimed land, near the end of the video.
Well, the second video says it is filmed in Chiba Province, and so could well be reclaimed land
I suspect the first video might also be reclaimed land.
If you live on a relatively small island like Japan it's nit surprising you'd want to make "extra land".
Even the US has reclaimed land in the San Francisco bay area and that land will also be very vulnerable in earthquakes.
Liquefaction in Past Earthquakes
You don't want to be flying into or out of Oakland international Airport when they have their next earthquake, just look at the amount of liquefaction expected at the airport!
So this effect isn't unique to Japan. But Japan will probably see more of it since they have more earthquakes, and possibly more reclaimed land.