Transformation of the Energy Sector and Consequences for the Energy Mix: A Case Study of Japan

Abstract Japan is regarded as an interesting source for drawing useful lessons that could help in drafting the process for transforming the Polish energy mix. The reason is very simple: the two countries have relatively similar starting points. A large proportion of the Japanese energy mix is still based on fossil fuels. We can already observe a slow but evident drift away from fossil fuels (from some 85% in 2013 to less than 75% in 2019). Another reason why Japan is relevant to the Polish conditions is the recent decision of the new government in Japan to return to nuclear energy after the Fukushima disaster. Other interesting solutions in the Japanese way forward include the wide use of hydrogen and ammonia; that could be interesting for Poland, because it is a major producer of hydrogen: the fifth in the world and the third in Europe. Grey hydrogen is currently produced, but that could easily be transformed into green hydrogen produced using distributed solar installations. It also seems that nobody in Poland is seriously working on the use of ammonia in the energy sector. Those reasons alone would be enough to choose Japan as the country for the analysis presented below, therefore the literature review is limited to the Japanese sphere. A short historical view of the energy-mix configuration is followed by an enumeration of the important aspects to consider for Polish conditions: energy security and energy efficiency, followed by an analysis of important sources of energy: nuclear, renewable energy sources (RES), hydrogen, and ammonia as well as thermal power development.