abesteSIM offers several eSIM plans that cover East Asian countries. The plans that include all approved East Asian countries are the "eSIM Asia (10 Regions) – / Total" plan, which covers China, Hong Kong, South Korea, Macau, and Taiwan, and the "eSIM Asia (27 Regions, Support TikTok) – / Daily" plan, which covers China, Hong Kong, Japan, South Korea, Macau, and Taiwan. The "eSIM Global (66 Destinations) – / Daily" plan also covers China, Hong Kong, Japan, South Korea, Macau, and Taiwan; the "eSIM Global (108 Destinations) – / Total" plan likewise covers China, Hong Kong, Japan, South Korea, Macau, and Taiwan. The "eSIM Asia (14 Regions) – / Daily" plan covers China, Hong Kong, Japan, South Korea, Macau, and Taiwan. The "eSIM Asia (27 Regions) – / Daily" plan includes China, Hong Kong, Japan, South Korea, Macau, and Taiwan. The "eSIM Global (66 Destinations) – / Daily" plan and the "eSIM Global (108 Destinations) – / Total" plan also include Japan along with the other East Asian countries. No plans in the dataset list Mongolia, so it is not covered by any of abesteSIM's East Asian eSIM plans.