Options compared
| Option | Price | Hassle | Calls | Best for |
|---|---|---|---|---|
| eSIM | Cheapest | Minimal | Usually no | Most travellers |
| Physical SIM | Moderate | Some | Usually no | Older phone / no eSIM support |
| Pocket WiFi | Most expensive | Highest | No | Group trips / multiple devices |
| Home operator (roaming) | Often most expensive | Zero | Yes | Short trips / emergency |
Our recommendation: Saily eSIM
eSIM is by far the simplest way to get data for Japan. You buy before departure, install on your phone without a physical SIM card, and it activates the moment you land. No airport queues, no fiddling, no returns.
View Saily plans →
Use code JUHOUT5251 for a discount on your first order.
Physical SIM — when it makes sense
If your phone doesn't support eSIM, a physical SIM is the next easiest option. The best approach is to buy online in advance — the card is delivered to your home and you activate it yourself after landing. Airport SIM vending machines also work but are slightly more expensive.
Good options: IIJmio and Mobal are reliable, English-language services with good coverage across Japan. IIJmio runs on Docomo's network, Japan's most comprehensive. Prices are comparable to eSIM services.
Tourist SIM cards sold in Japan are almost always data only — no calls, no SMS. If you need to make calls, you'll need your home operator's roaming package or an eSIM service that supports calls.
Pocket WiFi — is it worth it?
Pocket WiFi is a portable router that shares a connection across multiple devices. It can make sense if you're travelling as a group and want internet for everyone at a shared cost. Otherwise it's more awkward than an eSIM or physical SIM — one more device to carry, charge, and potentially lose.
If you're travelling as a group: Global WiFi and eConnect Japan are reliable providers. You can collect the device from the airport arrivals hall.
Practical tips
Install before flying: Install your eSIM at home — airport WiFi can cause activation issues. It activates only when you land in Japan.
Check eSIM support: Open phone Settings → Mobile/Cellular → look for "eSIM" or "Add Mobile Plan". If the option exists, your phone supports eSIM.
7-Eleven ATM: Cash is still important in Japan. 7-Eleven ATMs accept all international bank cards — plan your cash withdrawal locations in advance.
Google Maps offline: Download Tokyo's map for offline use before arriving — it saves data and works if your connection drops.