How to use eSIM in Japan during winter travel?

To use an eSIM in Japan during winter, first confirm that your phone is eSIM-compatible and unlocked. Purchase a Japan eSIM plan in advance, then install the eSIM profile over Wi‑Fi at home by scanning the QR code or following the manual activation steps. Label it clearly (for example, “Japan Data”) and set it as your primary data line while keeping your home SIM active only for calls or SMS. When you land in Japan, turn off data roaming on your home SIM, enable data on the Japan eSIM, and wait for it to connect to a local network. This setup lets you check weather, train delays, and navigation immediately—especially important in winter when snow can disrupt transport.