The Geographical Survey Institute surveyed 28 benchmarks in three prefectures, hit by the 11 March earthquake.

They confirmed that the land has dropped as much as 84cm (33 inches, just under 3 feet).

The land sunk in Fukushima, Miyagi and Iwate Prefectures.  They are now dealing with high tide flooding caused by the loss of their sea walls, and their sunken land.