Do I need an eSIM for Japan winter travel?

You don’t strictly need an eSIM, but it makes winter travel in Japan significantly smoother. Reliable mobile data helps you check live train delays, navigate in the dark or snow, translate signs and menus, and message your hotel if you’re running late. In winter, when you’re less willing to stand around hunting for public Wi‑Fi in the cold, having an always‑on connection is especially valuable. An eSIM is also more convenient than renting pocket Wi‑Fi in bad weather, since there’s no extra device to pick up, charge, or return.