The authors replied to the discussion by Dr. Yoshida first by emphasizing that the primary purpose of the paper is not to simulate observed records rigorously but to show how important to consider the excess pore water pressure in the soil amplification analysis during the Hyogo-ken Nambu earthquake. Then they answered the discusser's questions one by one. The water table is assumed as such from the P-wave velocity distribution since it is the only reliable source of information. The two-dimensional stress condition and its relationship to the excess pore water pressure assumed in the analysis is explained. Finally the basic concept on how to determine soil properties and their reliability alt discussed.
