The introduction of the three security documents will not only rapidly enhance Japan’s defense capabilities but will also become a significant turning point in Japan’s national security strategy. The Kishida Cabinet abandoned the policy of “exclusively defending defense” that the Japanese government has insisted on since the postwar period. It intends to fundamentally strengthen Japan’s defense capabilities by building a “counterattack capability” that can preempt strikes and promote the expansion of defense expenses，and then get rid of the “post-war system.” and become a “normal country.” However，Japan’s construction of “counterattack capability” will not only interrupt the post-war Japanese pacifism development line but will also intensify the regional security situation and create new unstable factors for regional peace and stability. In the future，the implementation of the “Three Security Documents” and the deployment and implementation of Japan’s security strategy may pose severe challenges to the security and stability situation in East Asia.