In 2002, Nishitakase-gawa River was selected as a target river for 'The Second Urgent Action Strategy for Water Environment Improvement' by the Ministry of Land, Infrastructure, Transport and Tourism and progress is underway to develop environment to enjoy water and to improve water quality.
平成14年（2002年）に国土交通省「第二期水環境改善緊急行動計画」の対象河川に選定され、水に親しむことのできる環境づくりや水質改善などの整備を進めている。