1. Research Institute for Humanity and Nature, Kyoto, Japan; Columbia Water Center, Columbia University, New York, USA; and Harvard T.H. Chan School of Public Health, Harvard University
2. Keio University, Yokohama, Kanagawa, Japan
3. Department of Urban Planning & Public Policy, University of California, Irvine, Irvine, CA, USA
4. Department of Earth and Environmental Engineering, Columbia University, New York, NY, USA
5. Graduate Institute of Urban Planning, National Taipei University, Sanshia District, New Taipei City 237, Taiwan
6. The Graduate School of System Design & Management, Keio University, Minato-ku, Japan
7. Yahoo Japan Corporation, Yahoo Japan Research, Tokyo, Japan