Abstract
To study of local fallout of Hiroshima A-bomb at present, direct evidences could be obtained by measurements of soil samples which is not affected by global fallout. We also could do model simulations. The basic concept of the simulation is to simulate behavior of fission products and induced radionuclides, especially to simulate wet and dry deposition of them. To do model simulations, we are going to prepare datasets of cloud height, distribution of fission products, distribution of Cs-137 originated Hiroshima A-bomb and area of rainfall etc. as initial and boundary conditions.