NIHON HIDANKYO is the only nation-wide organization of A-bomb survivors of Hiroshima and Nagasaki (Hibakusha). It has member organizations in all 47 Japanese prefectures, thus representing almost all organized Hibakusha. Its officials and members are all Hibakusha. The total number of the surviving Hibakusha living in Japan is about 300,000, as of March 1999. There are several thousands of more Hibakusha living in Korea and other parts of the world outside Japan. HIDANKYO is cooperating with those organizations in their work for the defense of the living and rights of these people.