Why you need an eSIM for Japan
Japan's mobile networks — Docomo, SoftBank, and au — offer excellent 4G and 5G coverage even in rural areas, but international roaming rates from home carriers are notoriously expensive. A travel eSIM installed before you board your flight is the fastest, cheapest way to get data from the moment you land at Narita or Haneda.
What to look for in a Japan eSIM
- Network partner — look for plans on Docomo or SoftBank; both have the widest coverage including the Shinkansen and subway tunnels.
- Data cap vs unlimited — a solo week in Tokyo typically burns 3–6 GB.
- Validity period — most plans run 7, 15, or 30 days from first use, not from purchase date.
- Throttling after cap — some "unlimited" plans slow to 1 Mbps after 1–3 GB. Fine for messaging; frustrating for maps or streaming.
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How to install your Japan eSIM
- Purchase a plan from your chosen provider before departure.
- You'll receive a QR code by email.
- Go to Settings → Mobile / Cellular → Add eSIM and scan the QR code.
- Set the eSIM as your data line; keep your home SIM for calls and texts.
- Activate only once you land — most plans start counting from first use.
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Compare eSIM plans for Japan
Live prices from verified providers — compare plans and buy in seconds. Updated daily.