Landed in Japan with No Internet? Get Connected Instantly with an eSIM!
Updated : 2025-06-20 16:40:46
Many people arrive at Narita, Haneda, or Kansai airports to find shops incredibly crowded.
- Couldn't buy a SIM card at the airport
- Didn't reserve Pocket WiFi
You might find SIM cards or eSIMs sold at convenience stores in tourist areas. However, the reality is that SIM cards and eSIMs available at convenience stores often have limited plans and higher prices.
The practical problem is that many people want internet access to look things up on their smartphones before even reaching tourist destinations, right? In such cases, an eSIM is a highly recommended immediate solution for connectivity. This article will clearly explain what an eSIM is, how to use it, and which smartphones are compatible.
What is an eSIM?
An eSIM is a virtual SIM built directly into your smartphone. There's no need to insert a physical SIM card; you can complete the contract and activation online, eliminating the need to visit airports or stores. You can purchase it anytime, anywhere. Plus, you can start using it immediately by simply scanning a QR code displayed after purchase with your smartphone.
Why eSIM is Recommended for Travelers to Japan
1. Instant Use
Since you can purchase and activate it online, you can start communicating from your smartphone on the spot, without going to an airport or convenience store.
2. Reliable Network Connection
It uses networks from major Japanese carriers (NTT Docomo, au, SoftBank), ensuring stable and high-speed communication.
3. Abundant Short-Term Plans
There are various short-term data plans available for travelers, ranging from 1 to 30 days. You can choose a plan that matches your length of stay.
4. Purchase Anywhere
You can buy an eSIM anywhere with even a little internet access – a hotel, a train station, a cafe, you name it.
Be Aware of eSIM Disadvantages
- You cannot use it if your smartphone is not eSIM compatible.
- You will need a temporary internet connection for the initial eSIM setup (e.g., using free Wi-Fi).
- SIM card and eSIM plans sold for short-term stays in Japan are typically data-only, meaning you cannot make calls or send SMS messages.
- If you delete an eSIM once, it cannot be reused. Be careful not to delete it.
How to Check eSIM Compatibility for Your Smartphone
For iPhone
- If you see "Add eSIM" or "Add Cellular Plan" under "Settings" → "Cellular," your device is compatible.
- Compatible models: iPhone XR and later (including SE 2nd generation and later).
For Android
- If "Add eSIM" appears under "Settings" → "Network & internet" → "Mobile network," your device is compatible.
- Examples of compatible models: Pixel 4 and later, Galaxy S20 and later, Xiaomi 12 series, etc.
How to Purchase & Use an eSIM (Step-by-Step Guide)
- Access an eSIM vendor website
- Select your country and plan (duration of stay, data amount).
- Purchase with a credit card or other payment method.
- Scan the displayed QR code with your smartphone.
- Turn on mobile data settings, and you're ready to go!
Recommended eSIM Plans
For a stable network connection anywhere in Japan, plans using the Docomo network are recommended.| Provider | Network | Days | Data | Price (JPY) |
|---|---|---|---|---|
| Travel Mobile | docomo | 8 | 30GB | 3200 |
| docomo | 16 | 50GB | 3800 | |
| docomo | 30 | 50GB | 4900 | |
| Sakura Mobile | docomo | 8 | Unlimited (3GB/day) | 4950 |
| docomo | 16 | Unlimited (3GB/day) | 7370 | |
| docomo | 30 | Unlimited (3GB/day) | 9900 | |
| Japan Wireless | docomo | 8 | Unlimited (3GB/day) | 4680 |
| docomo | 16 | Unlimited (3GB/day) | 7,956 | |
| docomo | 30 | Unlimited (3GB/day) | 11,232 | |
| Ubigi | docomo | 30 | 10GB | 2,600 |
| docomo | 30 | 50GB | 9,700 |
eSIM is Your Best Bet for Immediate Internet Access!
Whether you couldn't buy a SIM at the airport or forgot your Pocket WiFi, an eSIM offers an immediate solution.
- Purchase online & activate instantly
- Complete everything on your phone, no need for physical stores
- Stable internet connectivity across Japan
If your smartphone is eSIM compatible, there's no more convenient option. We highly recommend using an eSIM for your connectivity needs during your stay in Japan!
Frequently Asked Questions (FAQ)
Q. Can I set up an eSIM using only free Wi-Fi?
A. Yes, you can set it up by temporarily using free Wi-Fi.
Q. Can I tether (share with other devices)?
A. Most eSIMs allow tethering, but some plans may have restrictions. Check before purchasing. Travel Mobile allows tethering as long as you have data remaining.
Q. Can I make calls or send SMS messages?
A. Some eSIMs are data-only. If you need a phone number, please use VoIP apps (like WhatsApp or LINE).
Q. What happens if I accidentally delete an eSIM?
A. It cannot be reissued, so you should not delete it. Please be careful during setup.
Q. Can I buy an eSIM after I arrive in Japan?
A. Yes, if you have a smartphone and an internet connection, you can purchase and set it up after arriving.
Q. Is English support available?
A. Many eSIM providers offer English support and apps.
Q. After setting up an eSIM, can I use the internet immediately?
A. Yes, once you scan the QR code and complete the setup, you can start communicating right away.
Q. Can I have multiple eSIMs on my phone?
A. Yes, depending on your smartphone model, you can register multiple eSIMs and switch between them.
Q. What happens if I run out of data?
A. Depending on the plan, communication may stop or slow down. You may also have the option to purchase additional data.
Q. Do I need a credit card to buy one?
A. Most eSIM websites require credit card payment. It's not limited to eSIMs, but when paying with a credit card in Japan, 3D Secure authentication may be required. Make sure to change your credit card settings to receive 3D Secure authentication via email. If it's set to SMS authentication, your credit card might not work in Japan.
Q. Can I use it with a SIM-locked smartphone?
A. No, it cannot be used with SIM-locked (carrier-restricted) smartphones. Please unlock your phone beforehand.