Our EastESIM plans are tailored for specific countries or regions. If you've purchased a plan exclusively for Japan, it will only provide coverage within Japan's network, typically with carriers like NTT Docomo or SoftBank. A layover in Seoul, South Korea, even if brief, would fall outside this plan's coverage. For seamless connectivity during your transit in Korea and your main trip to Japan, we recommend exploring our multi-country Asia plans, which offer comprehensive data across several East Asian destinations, ensuring you stay connected from touchdown to departure.
HELP CENTER
Does my EastESIM Japan plan cover a layover in Seoul?
Updated April 22, 2026
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