Abstract
A Japanese ODA supported Rural Development Project in Northeast Thailand is a case of practically applying H.M. King Bhumipol's royal concept of “Sufficiency Economy” based on Buddhist concept. The Project promoted not only integrated agriculture practice but also several aspects of “Sufficiency Economy” such as community based development, staged and balanced development as well as local wisdom. By reviewing those practices, lessons learned and further issues are presented. Project lifted up living condition of farmers. Their success was shared among community members through altruistic leaders or “Learning Center” farmers. Community markets are mechanism for community to build up “Sufficiency Economy” system and incentives for farmers to continue integrated agriculture, while farmer networks are working as moral support of altruistic leaders and mechanism for sustainability.