This publication documents Japan’s experience in pursuing sustainable sanitation solutions in the context of economic development. Five case studies illustrate how sound sanitation policies are essential in achieving a nation’s growth. Selected projects in Kitakyushu City, Kobe City, Saitama City, Saitama Shintoshin, and Tadotsu Town provide examples of how robust sanitation systems can deliver economic and environmental benefits. Produced by ADB in cooperation with Japan Sanitation Consortium, this publication also documents key policies and laws that enable the integration of sewerage systems and wastewater treatment facilities in development plans. It shares learnings on how the sanitation challenge can be met, not only at the community, but also at the national level.