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.
Pada tanggal 27 September 1940, Pakta Tiga Pihak ditandatangani di Berlin oleh Saburō Kurusu dari Kekaisaran Jepang, Hitler, dan menteri luar negeri Italia Ciano, kemudian meluas hingga Hongaria, Rumania, dan Bulgaria, sehingga memperkuat kekuatan Poros.