It's a common misconception that international roaming is free or affordable in East Asia. Unfortunately, for travelers from Australia or the UK, your domestic SIM card will almost certainly incur significant roaming charges in Japan. Countries like Japan are not typically included in standard 'free roaming' zones for most international carriers. Using your home SIM for data in Tokyo or Kyoto could result in a surprisingly high bill. EastESIM provides a cost-effective alternative, connecting you directly to local Japanese networks like Docomo or SoftBank.
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Will my home SIM card from Australia or the UK offer free roaming in Japan?
Updated April 22, 2026
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