The Katayama Cabinet governed Japan under the premiership of Tetsu Katayama from 24 May 1947 to 10 March 1948, during the Allied occupation. It was the first cabinet under the postwar constitution.

Tetsu Katayama was a Japanese politician who was Prime Minister of Japan from 1947 to 1948. A Christian pacifist, he bears the distinction of having been the first socialist to serve as Prime Minister of Japan. He was a Christian socialist.