Analysis of Value Co-creation Between Farmers and Land Improvement District in Japan Through Irrigation Service Improvement by Good Water Quality

摘要

In Japan, agricultural sector including rice production has several problems that are complex of farmers aging, small scale farming, and high cost management. To improve this situation, Japanese government pushed to increase efficiency to change high profit production or large scale agriculture. In this research, objectives is analyzed that farmer's acceptability of new innovative irrigation water distribution technology to improve rice quality as high profitable production. As a methodology, water quality control management was assumed in a good rice quality control scenario for Agent Based Model (ABM). In water quality management for rice production, former research results showed that when nitrogen water quality was higher after flowering in rice growth stage, nitrogen concentration and protein contents ratio was increasing, then, taste of rice was decreasing. In study area as an example of application, Imbanuma basin is chose as high nitrogen concentration area. As results, the modified ABM was applied that farmer's preference would be no change in prior the cost, and if new irrigation would be accepted the profit would be higher than a threshold, though interview results for fanners were more complicated because of cost, profit, and risk management.