What was the common English nickname for Hirohito's 1945 surrender broadcast?

Hirohito's 1945 surrender broadcast was commonly nicknamed the Jewel Voice Broadcast.

The Japanese name is Gyokuon-hoso, a term referring to the emperor's voice in elevated, metaphorical language. The speech was broadcast on 15 August 1945 after Hirohito recorded the Imperial Rescript on the Termination of the War at the Imperial Palace.

The nickname is memorable because the broadcast marked a dramatic break with tradition. Most Japanese subjects had never heard the emperor speak publicly, and the recording was transmitted across the country at noon. The formal style and imperfect sound quality made the words hard for many listeners to follow.

The recording itself was nearly lost. Military officers opposed to surrender attempted a coup and searched for the records, but palace staff concealed and transported them safely. The speech did not explicitly use a plain phrase such as “we surrender”; instead, it announced acceptance of the Allied declaration and urged the Japanese people to endure the coming situation.