We investigate the impact of ENSO on the landfall characteristics of tropical cyclones (TC) over the Western North Pacific (WNP) during the summer monsoon season. During the early monsoon period (late May--late July), an increase in the numbers of TCs that make landfall in the Korean Peninsula or Japan is associated with an increase in the Ni¿o-3.4 SST anomalies. During the peak monsoon period (late July--mid September), the number of TCs that make landfall in the Indochinese Peninsula is greater in El Ni¿o years than in La Ni¿a years. Furthermore, in El Ni¿o years, the TCs that make landfall in the Korean Peninsula or Japan tend to have longer lifespan and greater intensities. These changes can be primarily attributed to the change in the mean TC formation location as a result of ENSO.