In this chapter, we have emphasized the need for ambitious energy and climate change policies, such as the introduction and expansion of carbon pricing In this paper we have emphasized the need for ambitious energy and climate change policies, such as the introduction and expansion of carbon pricing such as carbon taxes, Emission Trading Systems, and active support for decarbonization investment, in order for China, Japan and South Korea to move towards a decarbonized society by the middle of this century. This paper also considers the need for cross-border collaboration among the three countries, such as the establishment of a joint carbon trading system. This paper also considers the need for cross-border collaboration among three countries, such as the establishment of a joint carbon market, the introduction of a cross-border emissions trading system that will contribute to the expansion of Furthermore, this paper proposes the establishment of an independent organization between China, Japan and South Korea that can take the initiative in promoting regional cooperation. Furthermore, this paper proposes the establishment of an independent organization between China, Japan and South Korea that can take the initiative in promoting regional energy and environmental cooperation issues.