TBT (Technical Barriers to Trade) and SPS (Sanitary and Phytosanitary Measures) have two attributes. They act as barriers to trade expansion by protecting producers, but their importance has grown in terms of consumer protection measures after the COVID-19 pandemic. Rather than eliminating related regulations, achieving harmonization within the ASEAN region can simultaneously serve two objectives: expanding trade between South Korea and ASEAN and improving consumer protection. We assess the level of regional economic integration by measuring regulatory distances among ASEAN member states. We also measure regulatory distances between South Korea and ASEAN, and between Japan and ASEAN. We estimate the impact of ASEAN's TBT and SPS on the export performance of countries exporting goods to the ASEAN region.