Lee-Jay Cho, eminent demographer and economist, passed away October 31, 2020, in Honolulu, Hawaii. His research interests included regional economic development in east Asia and population policy and demography. He received his PhD in sociology from the University of Chicago, a doctorate in economics from Keio University and doctorate in demography from the University of Tokyo. He developed the own-children method in the mid-1960s which enabled obtaining age-specific fertility rates for years prior to a census or household survey using reverse survival techniques. The method has been repeatedly used over the years often to estimate fertility trends of subpopulations. His professional career included 30 years of service with the East-West Center, serving as Director of the East-West Population Institute, Vice President for Academic Affairs and Acting President. He advised many Asian governments and most recently was Chairman of the Northeast Asia Economic Forum.