Earthquake and tsunami disasters occur suddenly, and their effects are widespread. To respond effectively to such disasters, it is important to quickly gain an overall understanding of the damage. However, information about earthquakes or tsunamis, as well as damage to buildings and infrastructure, is typically gathered separately through visual inspection and manual processes. By leveraging modern sensor technology, a SATREPS project titled “Development of Integrated Expert System for Estimation and Observation of Damage Level of Infrastructure in Lima Metropolitan Area” was launched in 2021. The project aims to develop a system that provides a comprehensive picture of the damage immediately following a disaster, integrating the findings into a geographical information system with display capabilities. Group 1 focuses on earthquake and tsunami hazards, estimating the level of shaking and predicting tsunami damage. Group 2 focuses on damage detection and estimation, using sensors to assess the extent of damage to buildings and other infrastructure. Group 3 uses satellite imagery to understand the damage over a wide area and integrates the data from Groups 1 through 3. Group 4 is dedicated to developing the capacity to use the integrated expert system. The project is set to conclude in September 2026. This special issue has been organized to present the progress made over the past four years and to share the project’s achievements. It addresses earthquake hazards, damage estimation for buildings and infrastructure, satellite imagery for damage assessment, and human loss estimation.