On 27 September 1940, the Tripartite Pact was signed in Berlin by Saburō Kurusu of Imperial Japan, Hitler, and Italian foreign minister Ciano, and later expanded to include Hungary, Romania, and Bulgaria, thus yielding the Axis powers.
On September 27, 1940, ostensibly under Hirohito's leadership, Japan was a contracting partner of the Tripartite Pact with Germany and Italy forming the Axis Powers.
