Part I Overview and Context.- Chapter 1 Sustainability and Human Well-Being (Kiyoko Hagihara, Chisato Asahi).- Chapter 2 Water Resources Conflict Management: Social Risk Management(Yoshimi Hagihara, Kiyoko Hagihara).- Part II Socioeconomic Vulnerability in a Regional Perspective.- Chapter 3 The Depopulation Problem (Kiyoko Hagihara, Yoshimi Hagihara).- Chapter 4 Regional Vulnerability of the Tokyo Metropolitan Area to Flood and Earthquake Disasters (Sotaro Tsuboi, Chisato Asahi).- Chapter 5 Regional Vulnerability in Okinawa Prefecture (Daisuke Kamiya).- Chapter 6 Health and Environmental Risks Related to Water Supply and Sanitation in the Socio-Environment of Rural Bangladesh (Akira Sakai, Kunio Takahashi, Maiko Sakamoto, Yoshimi Hagihara, Kiyoko Hagihara).- Chapter 7 Safe Drinking Water and Sanitation Awareness in Rural Bangladesh (Akira Sakai, Maiko Sakamoto, Kunio Takahashi).- Part III Evaluation of Regional Vulnerability.- Chapter 8 Marginal Willingness to Pay for Public Investment under Urban Environmental Risk: the Case of Municipal Water Use (Kiyoko Hagihara, Chisato Asahi, Yoshimi Hagihara).- Chapter 9 Economic Valuation for Improving Supply Reliability: Risk Countermeasures for Water Quantity and Quality in Water Supply Systems (Chisato Asahi, Kiyoko Hagihara).- Chapter 10 Evaluation of the Vulnerability of Municipal Water Infrastructures (Chisato Asahi, Kiyoko Hagihara).- Chapter 11 Social Environment Analysis Regarding Arsenic Contaminated Drinking Water in Bangladesh (Yosuke Fukushima, Yoshimi Hagihara, Kiyoko Hagihara).- Chapter 12 The Vulnerability of Toilet Facilities in the Bangladesh Rural Area and Sanitary Improvement by Introduction of the Eco San Toilet (Kunio Takahashi, Akira Sakai, Tofayel Ahmed).- Part IV Risk Management of Regional Vulnerability.- Chapter 13 A Supply System for Municipal Water with Uncertainties (Chisato Asahi, Kiyoko Hagihara).- Chapter 14 Community Level Planning for Arsenic Contaminated Drinking Water in Bangladesh(Sho Shibata, Kiyoko Hagihara, Yoshimi Hagihara, Akira Sakai).- Chapter 15 Study on Planning Scheme to Improve the Living Environment through Safe Water Supply and Sanitation in a Rural Village of Bangladesh (Akira Sakai, Tofayel Ahmed, Maiko Sakamoto).- Chapter 16 Waterside Environmental Management Incorporating Sustainability and Survivability (Kiyoko Hagihara, Yoshimi Hagihara, Masanori Kawano).- Chapter 17 Third Party Intervention in Conflict Resolution: Dispute between Bangladesh and India over Control of the Ganges River (Kieth W. Hipel, Maiko Sakamoto, Yoshimi Hagihara).