Abstract
This study compares the characteristics of shoreline change, i.e. erosion and recovery, of damaged coasts in Indonesia and Thailand due to the 2004 Indian Ocean Tsunami, with those of a damaged coast in eastern Japan due to the 2011 Great East Japan Tsunami. The results shows two major characteristics: (i) sand bar erosion and recovery at different positions and (ii) serious coastal erosion and insufficient recovery. In addition, the coastal recovery, having been observed until around one year later from the tsunamis, has not been observed after one year at all the coasts damaged due to the 2004 and 2011 tsunamis. These indicates that the coasts that insufficiently recovered after the 2011 tsunami would not recover at least in decades.
