SATOYAMA CLUB demonstrated of a new energy system aimed for utilization of the woody biomass in the Expo '70 Commemorative Park (Suita-shi, Osaka) from 2005. And, in SUCTION, the development of the indirect heating type Stirling engine that used thermal oil for the heat transportation is in a good results. 1kW and 10kW class engines have been developed using a heat source of 300 degrees Celsius. From 2008, the 1kW class engine has been installed on a wood biomass boiler. The hot water from the boiler is used for a foot spa and the electricity is used for charging batteries of electrical bus. It is demonstrated now in the Expo '70 Commemorative Park.