The 2011 off the Pacific coast of Tohoku Earthquake caused widespread serious damage. Particularly a huge amount of disaster wastes was generated along coastline areas of the Tohoku region by tsunami during the Tohoku Earthquake. It is very important to estimate amount of tsunami disaster wastes as for quick recover and revival of damaged areas in advance. Since a tsunami height in Shikoku region during next Tounankai-Nankai Earthquake will be larger than a height of the Tohoku Earthquake, it can be anticipated easily that an amount of disaster wastes in Shikoku districts will very large also.
In this paper, it was described some factors of Tsunami disaster wastes generated by 2011 off the Pacific coast of Tohoku Earthquake. And it can be cleared that there is good relationship between a damage level of household and a tsunami depth at that point, and it was calculated per unit generation of tsunami disaster wastes in accuracy. And more it was estimated the amount of tsunami disaster wastes and the number of submerged households in Shikoku districts by supposed tsunami during Tounankai-Nankai Earthquake using GIS.