The tsunami caused by the Hokkaido Nansei-Oki Earthquake (M=7.8) on July 12, 1993 brought severe damages over wide area along the Japan sea. The topical points of the Hokkaido Nansei-Oki Earthquake tsunami are : (1) This tsunami was generated at a location where earthquakes have not been observed before.(2) The runup of this tsunami records maximum height in the recent years.(3) Effects of trapping produced serious devastations at Okushiri Island.
This paper aims to present some characteristics of this tsunami with the analysis of field survey, theoretical analysis and the numerical simulation