Is this EastESIM valid for South Korea if my plan is for Japan only?

If your EastESIM plan is specifically for Japan, it will only provide data within Japan's borders. Many travelers combine trips to nearby countries like South Korea or Taiwan. In such cases, a Japan-only eSIM will not work once you cross into South Korea. We highly recommend checking out our Regional Asia eSIM plans if your itinerary involves multiple countries. These plans offer seamless connectivity across a broad range of East and Southeast Asian destinations, ensuring you remain connected throughout your entire multi-country journey without needing separate eSIMs.