epresentationinvolves the last 15-year experience of a Japanese model of community-based precision agriculture."Community" implies self-governance group of practitioners and/or players ofprecision agriculture, and"precision agriculture" implies evidence-based farm management as known well in the world.The combination/arrangement of farmers'decision makingprocess and field management practiceslead us to a new stage of re-discoveringa story of precision agriculture, in particular on a number of widely scattered small farms.Community-based precision agriculture could be a group farming system with consensus of farmers and residents, to gain high profitability and reliability under regional and environmental constraints, promoted by professional farmers and technology platforms, and toprovide both information-oriented fields and information-added products into foods chain.This definition has been providing a playground of farmers, engineers/scientists, and business people to take actions together.The 15-year experienceshowed five phases of precision agriculture which were different modes on the same concept, respectively.The first phase was the site-specific crop management with concept innovation in early'90s.The second phase was the sensor-based site-specific crop management as system mechanization with variable-rate operation in mid-'90s.The third phase appeared in the latter part of the'90s with the modem definition of precision agriculture.The fourth phase was a cost-driven and company-based precision agriculture which was adopted in the areas of big-scale farming of such cereal crops.In the 21 st century the fifth phase was a cost-driven and community-based precision agriculture which was accepted in the areas of small-scale family farming of value-added crops.One participant was a local learning groupof"Honjo Precision Farming Society (HPFS)" in Honjo City, Saitamaprefecture close to Tokyo.The first action was market research using information-added produce through in-shop experiments, followed by branded-produce strategy, environment-friendly farming, capacity building of young farmers, good agricultural practices, and soon.The community-based precision agriculture has been applied in different fields or regions, such as the education for sustainable development (ESD) on Java island of Indonesia, precision restoration agriculture against the East Japan earthquake and tsunami in 2011, and agro-medical initiative (AMI) and agro-medical foodsas a collaboration project among medicine, agriculture, engineering, dietetics, and business.The government has issued anICT strategy to promote agro-informatics with organizing trans-industry standards in 2014.