A genetic linkage map for Japonica rice has been constructed from 58 random amplified polymorphic DNA (RAPD) and nine restriction fragment length polymorphism (RFLP) markers. The map was constructed using an F_2 population from the cross of two Japonica varieties, Taichung 65 and Nipponbare. The RAPD linkage groups were assigned to the ten rice chromosomes on the existing RFLP map by RFLP analysis. This map should form the basis for the analysis of useful genes in Japonica rice.