The purpose of this paper is to examine how Japan is internalizing the current trend of carbon neutrality and the realization of a green economy, and to analyze the contents and decision-making process of related policies in the power generation sector in particular. This is because decarbonization of the power generation sector is key to the realization of carbon neutrality and a green economy. Therefore, the subject of the analysis in this paper is the offshore wind and nuclear-related plans related to the power generation sector, among the strategies of the Japanese government to achieve green growth. The study reveals that the Japanese government has prioritized coordination with the related industries through various policy mechanisms in the Japanese energy policy-making process. In the end, the role of the Japanese government is to shape policy by bringing together the diverse voices of potentially conflicting industries. However, it is difficult to see the results of such coordination as a result of coordinating different voices in the energy industry as a whole. reflects the voice of some gigantic industries. To what extent these strategies can contribute to the goal of achieving carbon neutrality, and which actor’s influence was greater, are left to future research.