What was the recorded 1945 Japanese surrender speech commonly called?

The recorded 1945 Japanese surrender speech is commonly called the Jewel Voice Broadcast.

The Japanese name is Gyokuon-hōsō. “Gyokuon” refers to the emperor’s voice and is often rendered in English as “Jewel Voice.” The address was broadcast by NHK at noon on 15 August 1945, after a phonograph recording made at the Imperial Palace the previous night.

The speech announced that Japan had accepted the provisions of the Allied declaration. Because Hirohito spoke in formal Classical Japanese and the recording quality was weak, many people did not immediately understand that the message meant surrender. A radio announcer explained its meaning after the recording ended.

The broadcast became a defining moment in Japanese history, but it did not itself constitute the signed legal instrument. That document was signed aboard USS Missouri on 2 September 1945, formally ending hostilities with the Allied powers.