Indeed! Japan's infrastructure is legendary, and this extends to its mobile network coverage. With your eSIMAdventures plan, you can expect a stable 4G/5G signal across most of your journey on the iconic Shinkansen (bullet train), linking major cities like Kyoto and Hiroshima. Even within the extensive underground networks of the Tokyo Metro and Osaka Subway, mobile signal is widely available, ensuring you can navigate, research, and stay connected while commuting beneath the cities.
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Will I have internet coverage on Japan's Shinkansen and Tokyo Metro?
Updated April 22, 2026
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