Before the outbreak of the Russia-Ukraine conflict，under the influence of the strategic competition between China and the United States，the COVID-19 pandemic，the global chip crisis，and other factors，Japan had already begun to adjust its supply chain security policy and raised it to the height of economic security strategy. It can be seen that the Russia-Ukraine conflict is not a single factor affecting the Japanese supply chain，but it is superimposed with other factors to further expand and deepen its impact. For this reason，on the one hand，Japan has further strengthened and promoted the intensity and pace of the existing supply chain security policy adjustment. On the other hand，Japan has strengthened the pertinence and timeliness of supply chain security policy adjustment. It includes not only clearly targeted policies to stabilize the supply of certain essential materials such as energy，semiconductors and food but also includes consistent and international policies to enhance the security of supply chain processes such as promoting digitalization，visualization and network security，to reflect the systematization of supply chain security policies. Japan’s supply chain security policy adjustment is an essential embodiment of its national security strategy and economic security strategy transformation.