 Its land area has been increasing with land reclamation and coastal uplift in the north due to plate tectonics with a convergent boundary.Honshu has of coastline.Mountainous and volcanic, Honshu experiences frequent earthquakes (the Great Kantō earthquake heavily damaged Tokyo in September 1923, and the earthquake of March 2011 moved the northeastern part of the island by varying amounts of as much as  while causing devastating tsunamis).