The developed countries, except for the USA, have ratified the Kyoto protocol as of February 16th, 2005. Under the protocol, Japan must carry out the promised reduction in emissions of 6.0 percent from 1990 levels during 2008 - 2012. Using an M-model of elasticity approximation, we have estimated that the commercial energy consumption in 2012 will be 2.83 x 1018 J/Year. The optimum system for the commercial energy has been discussed by means of the industry association table.