The implementation of domestic solid waste management in Padang City conducted by the government still uses a conventional method, including acollection-transportation-disposal system with only about 5% of solid waste recycling rate. In Japan, Kitakyushu City manages its domestic solid waste appropriately by recycling the solid waste into beneficial products and applying sea reclamation landfill for solid waste residues from the final treatment process. By conducting Life Cycle Assessment (LCA) analysis, this study examines the appropriate improved scenario of domestic solid waste management in Padang City throughevaluation and improvement of the existing implementation and the shortcomings of Padang City based onthe case study inKitakyushu City, comprisingfour scenarios. Scenario 0 presents the existing condition; scenarios 1, 2, and 3 present the improvement of Scenario 0 in recycling percentage rate and technology implementation in a row by composting, incineration, and anaerobic digestion. CML 2001 is used to assess the environmental impact of Global Warming Potential, Acidification Potential, and Eutrophication Potential. This study implies that Scenario 1 is the most appropriate scenario for improving domestic solid waste management in Padang City because of the low environmental impact as the smallest normalization score of 5.81×10−10.