Nin'gen'-sengen (人間宣言, lit. declaration of human being) in 1946 is a national radio broadcast in which Hirohito renounced his divinity and declared that Japan's sovereignty rested with the people.
His script was drafted by Reginald Horace Blyth, who introduced Zen and Haiku from Japan to the rest of world.
See also: Hirohito, Reginald Horace Blyth, Douglas MacArthur