What was the name of Emperor Hirohito’s recorded surrender message broadcast by NHK in 1945?

Emperor Hirohito’s recorded surrender message is known as the Jewel Voice Broadcast.

The broadcast aired on NHK at noon on 15 August 1945. Its Japanese name, Gyokuon-hōsō, refers to the emperor’s voice in elevated, metaphorical language. Hirohito read the Imperial Rescript on the Termination of the War, announcing that Japan had accepted the Allied terms. The familiar English label became especially widespread in later historical writing.

The message was recorded at the Imperial Palace on 14 August, not delivered live on the radio. Officials produced more than one recording, and one copy was hidden during an attempted military coup intended to stop the announcement. The formal classical language and poor sound quality made the speech hard for many ordinary listeners to follow. The Jewel Voice Broadcast should not be confused with the Japanese Instrument of Surrender, which was a written document signed aboard USS Missouri on 2 September.