In this study, effects of urban heating on development of the Nerima heavy rainfall on 21 July 1999 in Tokyo were investigated by a coupled model of a cloud resolving model CReSS and a precise land surface model SiBUC (CReSiBUC). Four numerical simulations were carried out for the rainfall event. The first simulation had realistic land cover, second one had imaginary land cover (urban area is changed into paddy field), the third one had imaginary land cover (urban area is enlarged) and forth one had realistic land cover and imaginary anthropogenic heat. From those simulation, it was found that changes of distribution of urban and anthropogenic heat amount greatly affected on the positions and amounts of rainfall.
