The total cost of an irrigation service is analyzed by applying the service science approach to study the Aichi Irrigation Scheme. By interviewing farmers and water user association members, the cost of construction and water management of irrigation facilities from an upstream dam to the downstream intake of a paddy field are collected and analyzed. At the Aichi Irrigation Scheme, irrigation is a service because it is produced co-operatively by a governmental water resources organization, a water user association and farmers. The main type of irrigation is supplemental irrigation to irrigation ponds. By estimating the cost and benefits of an irrigation scheme at a pond, the total cost payment system has strong characteristics of a fee paid for insurance against droughts.
