Yes. Japan’s infrastructure is world-class. You will have a stable 4G/5G signal while traveling on the Shinkansen between cities (e.g., Tokyo to Osaka). Even in the extensive underground subway networks of Tokyo and Osaka, mobile signal is available in stations and tunnels, allowing you to check Google Maps or train schedules via HyperDia or Navitime continuously.
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Will I have internet coverage on the Shinkansen (Bullet Train) and Tokyo Metro?
Updated April 22, 2026
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