SIM Cards & eSIMs in Japan: The Traveler's Guide
2026-08-10 · Zenrate Team
Staying connected in Japan is easier than ever for foreign visitors. Whether you want to navigate subway maps, translate menus, or share photos on the go, you have three main options: a prepaid SIM card, an eSIM (a digital SIM built into your phone), or a pocket WiFi (a portable router you carry around). This guide breaks down each one so you can pick the right fit before you land.
Prepaid SIM Cards: The Classic Choice
A prepaid SIM is a physical chip you swap into your phone in place of your home SIM. Japan's prepaid tourist SIMs are almost always data-only — meaning you get mobile internet but no local Japanese phone number for calls or texts. If you need to call local restaurants or hotels, you can use apps like WhatsApp or Google Voice instead.
Where to buy: Convenience stores (7-Eleven, FamilyMart, Lawson), major electronics retailers like Yodobashi Camera and Bic Camera, and airport kiosks at Narita and Haneda. Airport kiosks and electronics stores often have English-speaking staff or printed English instructions in the box.
Price range: Plans typically run from around ¥2,000 to ¥6,000 (roughly 13 to 40 USD) for 7 to 30 days of data, depending on the provider and data allowance. IIJmio and NTT Communications are popular brands you'll see on shelves. A common 15-day, 15 GB plan from these providers sits around ¥3,500 (about 23 USD).
Things to check before you buy:
- Make sure your phone is SIM-unlocked (contact your home carrier if unsure)
- Confirm your phone uses a nano-SIM size — most modern phones do
- Check whether tethering (using your phone as a hotspot for a laptop) is included
eSIMs: The Easiest Option If Your Phone Supports It
An eSIM lets you activate a local data plan without physically touching a SIM card. You scan a QR code — usually emailed to you — and your phone connects to a Japanese network within minutes. You can even set it up before you board your flight home.
Compatible phones: iPhone XS and later, Google Pixel 3 and later, Samsung Galaxy S20 and later — but check your specific model on the provider's website to be sure.
Where to buy: Directly through provider apps or websites. Popular options for tourists include Airalo, IIJmio, and GTN Mobile. You buy online, receive a QR code by email, and activate it yourself.
Price range: eSIM plans for Japan generally cost ¥1,500 to ¥5,000 (about 10 to 33 USD) for 7 to 30 days. A typical 10-day, 10 GB eSIM through Airalo runs around ¥2,200 (roughly 15 USD). Prices are competitive with physical SIMs, and the convenience of not hunting for a store makes eSIMs increasingly popular.
One catch: Some budget eSIM plans throttle (slow down) your speed after you use a set amount of data each day, so read the fine print before purchasing.
Pocket WiFi: Best for Groups or Multiple Devices
A pocket WiFi is a small device — about the size of a deck of cards — that creates its own WiFi hotspot. Multiple people or devices connect to it at once, which makes it a good choice for families or travel groups.
Where to rent: Airport counters at Narita (NRT) and Haneda (HND), or pre-book online through services like Japan Wireless or Ninja WiFi for pickup at the airport.
Price range: Rental typically costs ¥300 to ¥700 per day (about 2 to 5 USD), plus a one-time return shipping fee of around ¥500 to ¥1,000 (3 to 7 USD) if you mail it back. A 10-day rental can total ¥4,500 to ¥8,000 (30 to 53 USD) depending on the plan and provider.
Downsides to keep in mind:
- You must carry and charge the device daily (battery life is usually 8 to 10 hours)
- You must remember to return it — losing the unit can trigger a replacement fee of ¥10,000 or more (66 USD or more)
- If you're traveling solo, it's rarely cheaper than a SIM or eSIM
Quick Comparison
| Option | Typical Cost | Best For |
|---|---|---|
| Prepaid SIM | ¥2,000–¥6,000 total | Solo travelers with unlocked phones |
| eSIM | ¥1,500–¥5,000 total | Anyone who wants setup before arrival |
| Pocket WiFi | ¥300–¥700/day + fees | Groups sharing one connection |
Tips to Avoid Common Mistakes
- Buy at the airport on arrival if you want a physical SIM without advance planning — Narita and Haneda both have well-stocked counters past customs.
- Do not wait until you're in a rural area to set up connectivity — coverage is excellent in cities but activation sometimes requires a working internet connection.
- Keep your home SIM safe in your hotel room or wallet so you don't lose it during the swap.
- Check your plan's expiry date — many tourist SIMs are calendar-day plans, not 24-hour rolling periods, so a "7-day" plan bought on a Tuesday expires the following Monday at midnight.
Once you're connected and moving around Japan, you'll find yourself checking prices constantly — from a ¥3,500 SIM plan to that ¥2,200 eSIM deal you spotted online. Knowing exactly what those yen amounts mean in your home currency makes budgeting stress-free, and that's exactly where Zenrate comes in: open the app to get a live JPY exchange rate and convert on the spot before you spend.
References
- IIJmio tourist SIM plans: iijmio.jp/guide/outline/sim
- NTT Communications prepaid SIM: ntt.com/en/services/network/mobile/prepaid.html
- Airalo Japan eSIM plans: airalo.com/japan-sim-card
- Japan Wireless pocket WiFi rental: japan-wireless.com
- Ninja WiFi rental: ninjawifi.com
- Narita Airport SIM/WiFi services: narita-airport.jp/en/service/other/sim