“…He found that although production efficiency increased in almost all of the prefectures between 1970 and 1990, it declined in approximately 80% of Japan's prefectures, including highly populated prefectures such as Tokyo and Osaka, between 1990 and 2010. However, the environmental efficiency of production activities based on accumulated resources in the cities of Japan has not yet been analyzed because the DEA framework used in Eguchi (2017) does not account for the associated environmental burden. According to the Paris Agreement, Japan is obligated to reduce CO 2 emissions by 26% relative to 2013 levels by 2030 (United Nations 2016).…”