Abstract
This article describes the world oil production situation and energy risk. The evidence of peak out oil were explained in various aspects, namely trends of oil prices , global oil field production histories and so on. The other conventional fuels as natural gas , coal and nuclear energy were discussed. In addition the role of renewable energy and long-term trends of future energy supply was investigated beyond 2010 to 2100. Finally the impact of global energy change on society in Japan was discussed. The way to minimize the risk was discussed based on energy supply scenario.
