Abstract
We analyzed an improvenent of energy efficiency in Japan between 1971(just before the first energy crisis)and 1988. Doubtlessly, we may conclude that the energy saving in manufacturing as a whole is successful. In heavy-chemical industries, energy efficiency keeps a high level even after the end of the second energy crisis. In light industries, in contrast, the oil price crash caused a gradual fall in energy efficiency.Therefore we can conclude that Japanese energy saving has two aspects, namely(1)in heavy-chemical industries, the energy saving is a matter of technology and is established, and(2)in light industries, energy saving has a feature of movement.For the purpose of modernization of developing countries, we have to consider not only direct aid to them, but also indirect one which includes the transfer of energy saving technologies to the countries which have already developed heavy-chemical industries.
