On July 27, 1953, the Korean War Armistice Agreement was signed, bringing an end to over three years of conflict. Prior to this, in 1950, Japan’s National Police Reserve was established to fill the security vacuum created by the deployment of U.S. forces from Japan to the Korean Peninsula. This organization later evolved into the National Safety Forces and eventually became the Japan Self-Defense Forces in 1954. The upheaval of the Korean War marked the definitive beginning of a shared security journey, in which the United States and Japan worked together for regional peace and stability.