Four prefectures of Shikoku Island, Japan were appointed as the promotion areas for a countermeasure against preventing Tonankai-Nankai earthquake disaster. In the coasts of Shikoku Island, the hazard maps based on tsunami numerical simulations are usually made as the basic data for making plan of preventing tsunami disaster. Tsunami numerical simulations performed on the various conditions in different areas, and they become data basis for a countermeasure of preventing. Using integrated numerical research system, which facilitates the tsunami numerical simulation on coasts of Shikoku Island, this report evidences the problems about the tsunami prediction, examining the effect of input condition on the numerical results. It is recommended considers using the tsunami numerical simulations as the basic data for the hazard maps of disasters area.
