nextSIM offers a range of eSIM plans that cover the East Asian region. The eSIM Unlimited Standard Asia and eSIM Asia Economy plans cover Hong Kong, South Korea, Macau and Taiwan. The eSIM Unlimited Standard Global, eSIM Global and eSIM Unlimited Plus Global plans cover China, Hong Kong, Japan, South Korea, Macau and Taiwan. The eSIM GLOBAL Premium and eSIM ASIA and Middle East Premium plans cover China, Hong Kong, Japan, South Korea, Mongolia, Macau and Taiwan. All of these plans also extend coverage to additional regions beyond East Asia, although only the countries listed above belong to the region referenced in the question.