The Katsura-Sagami River, which runs from Yamanashi Prefecture to the central area of Kanagawa Prefecture and flows into Sagami Bay, has been supporting industrial development in adjoining cities but at present, important issues for environmental conservation are accumulating. The Katsura-Sagami River Basin Council is promoting the Local Agenda 21 of the Katsura-Sagami River Basin in order to build an environmental conservation-oriented society based on sustainable development, and to hand down the many blessings from the clean, bountiful Katsura-Sagami River to the next generation.