This paper presents an inverse analysis of unobserved triggering factors for liquefaction hazard assessments based on Structural Equation Modeling (SEM). As a cross-validation on the model performance, the past occurrences of liquefaction (i.e., endogenous variables) were divided into the following two groups: i) Case 1: Reclaimed land area over old river-course; and ii) Case 2:Micro-topographic and sand-ground area. Through the above procedure, the TFI maps were produced in Case 1 and Case 2, respectively. As a final product, the differences of these TFI maps were also delineated on a "Difference map (DIF map)." As supporting and heuristic information, the DIF map and its interpretation might be useful not only for the pixel-based estimation of unobserved triggering factors, but also for improving the cost-effectiveness of locating the places for the field measuring systems in the liquefaction hazard assessments.