No, if you listen to the guy in the video, that part of Japan is on a piece of reclaimed land, where part of a bay used to be apparently. As has been said numerous times now, it appears as though that part of the land has been shaken loose and might sink into the sea.
could that be water pipes under the park?
freaky if it isnt cuz that should mean theres alot of not solid space underneath japan.
This is called Liquefaction. "In geology, liquefaction refers to the process by which saturated, unconsolidated sediments are transformed into a substance that acts like a liquid.
Earthquakes can cause liquefaction where loosely packed, water-logged sediments come loose from the intense shaking of the earthquake."