Journal of Groundwater Hydrology

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Shimabara Peninsula in Nagasaki Prefecture, Japan, is one of the areas where severe nitrate pollution has occurred. In Oct 2006, Nagasaki Prefectural office formulated the 1st term plan and kept on revising it to reduce nitrate pollution in Shimabara Peninsula. This study aims to identify the transition of management conditions, goals, and measures regarding those plans by document analysis and interview. The main findings of this study are as follows; (1) In the beginning, formulating the 1st term plan to reduce nitrate pollution in Shimabara Peninsula was behind schedule. (2) Four goals for this plan were set according to the achievement period. (3) Those measures had some unique characteristics; for example, ensuring the safety of tap water and drinking water wells was listed at the top to reflect residents’ concern about groundwater safety. (4) The main approach for implementing measures was the so-called “supportive instruments,” which promote behavioural change through various support. This article concludes that these findings might contribute to effective planning and improvement.

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