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Why International SIMs Often Fail—And Which Local eSIMs Actually WorkPlanning a trip to Japan? Don’t wait until you land at Narita or Haneda to figure out your mobile connection. Whether you need Google Maps to navigate Tokyo’s train system or want to upload your Kyoto photos instantly, having reliable data in Japan is essential.And while international eSIMs may seem like the easiest solution, they often don’t work well in Japan. Here's what you need to know—and which local eSIM options ...