The article explores the economic efficiency of energy security strategy in Japan, as one of the most unique system of providing effective measures for energy security in short and long-term perspective. This analysis based on the evaluation of the Japanese energy portfolio and the Energy Trilemma Index Rankings and Balance Score of Japan. It was identified the main threats for Energy Security in Japan and the main suggested activities of the Japanese government for solving these threats of Energy Security. As a result, it was presented the matrix of pairwise comparisons of the qualities of suggested national activities of Energy Security of Japan. Finally, it was identified the main strengths and weaknesses of Energy Security Strategy of Japan in the modern stage of development.