standard wave Saipan OWI radio station Radio Japan Potsdam Declaration Hiroshima
The 50,000-watt standard wave station on Saipan, the OWI radio station, broadcast a similar message to Japan every 15 minutes about Hiroshima, stating that more Japanese cities would face a similar fate in the absence of immediate acceptance of the terms of the Potsdam Declaration and emphatically urged civilians to evacuate major cities. Radio Japan, which continued to extoll victory for Japan by never surrendering  had informed the Japanese of the destruction of Hiroshima by a single bomb.
