Two questions decide this: how long you are staying, and whether you can pass a Japanese credit check. Price barely matters until you have answered both.
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The obstacle is not money, it is that a Japanese carrier contract needs a credit check you cannot pass yet — the same wall that blocks fibre internet, which refuses debit cards outright. Prepaid steps around it completely.
No screening, usable the same day
The only option here that asks nothing of your credit history. If you have just arrived and cannot yet pass a contract check, this is the one that works.
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For people carriers have already refused
Specialises in customers who fail carrier credit checks. Unglamorous, and the right answer if you have already been turned down.
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For a trip, an eSIM is simply better. It installs before you fly, so you have data walking out of the arrivals hall, and there is nothing to collect at a counter or post back afterwards.
Data before you land, nothing to collect
Installs on your phone before you arrive, so you have data walking out of the airport. Works in Japan and around 190 other regions.
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A data eSIM gives you no Japanese phone number. If you are staying and will need a bank account, you need a number — banks expect one — so read the arrivals section above instead.
Rental sits between prepaid and a contract: monthly pricing without signing up to two years or paying to leave.
Rent by the month, no contract
Built for stays measured in months. You rent the SIM and hand it back, so there is no contract to unwind when you leave.
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Cancel any month without a fee
Same rental idea as REN SIM, with a pocket Wi-Fi option if you need to cover a laptop as well as a phone.
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Once you can pass a contract check, a standard budget carrier is materially cheaper per month than anything above. That is the only situation where it wins.
Cheapest per month if you are staying
A standard Japanese budget carrier. Best value once you can pass a contract check and know you are here for a while.
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A SIM covers a phone. For a laptop, or when you cannot install home internet, pocket Wi-Fi is the other route — including prepaid devices that need no contract.
Ranked by what you can actually complete in your situation, not by what pays us. Prices are left as checking rather than guessed, because Japanese mobile pricing changes often and a stale figure on a page like this is worse than no figure.
This page contains advertising links. If you sign up through one we may earn a commission, at no extra cost to you. It never changes which option we rank first.
