DC-DECOM: Cost-Optimal Decarbonization Pathways for Data Centers in Japan

DC-DECOM is a multi-regional bottom-up linear programming model of the decarbonization of Japan's data centers over 2024-2040. Version 2.0.0 contains the updated model of the doctoral dissertation (DC-DECOM v2: 96 representative hours, endogenous siting, grid constraints and reinforcement cost, non-fossil certificates, PUE recalibrated with JMA observed temperatures, rolling A/B/C policy comparison, uncertainty analysis), the v1 model of Toyohara & Zhou (2026) with implementation errors E1-E8 fixed, input data with sources, and the committed results. The results of 2.0.0 differ from those of 1.x and from the values reported in the article.