Japan and Germany are strategic partners that share universal values, and the co-operation between the countries in the fields of energy and environment is one of the pillars of the bilateral cooperation. The author has been a member of the German-Japanese Energy Transition Council since 2016 and has been involved in the cooperation between the two countries. In this paper, the author would like to express his humble opinions about the current status and future issues of the German-Japanese energy and environmental cooperation in light of his previous experiences.