What was the wartime name of Hirohito's August 15, 1945 surrender address?

Hirohito's August 15, 1945 surrender address is commonly called the Jewel Voice Broadcast.

Its Japanese name, Gyokuon-hoso, refers respectfully to the emperor's voice. The speech announced that Japan had accepted the Allied terms, but it did not use the simple phrase “Japan has surrendered.” Instead, listeners heard highly formal language about accepting the “joint declaration.”

The address was recorded on phonograph discs in the Imperial Palace late on August 14. A small group of military officers attempted to prevent its broadcast during a failed coup, but the recordings were hidden and safely delivered to NHK.

The English label “Jewel Voice Broadcast” became especially common outside Japan decades later. In Japan, the original Japanese name remains the standard historical term. The broadcast was a public announcement; it was not the same event as the signing aboard USS Missouri.