TOP SIM: the best data SIM in Japan
Japan’s Most Reliable Data SIM
— for Residents and Travelers Alike
Download the app and choose a data plan that works best for you.
TOP SIM: the best data SIM in Japan
Japan’s Most Reliable Data SIM
— for Residents and Travelers Alike
Download the app and choose a data plan that works best for you.
-
No registration, no bank account, no ID check required
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Data rollover up to 180 days
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Each recharge extends SIM validity
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Top-up your data at convenience stores in cash or by credit card online
- No registration, no bank account, no ID check required
- Data rollover up to 180 days
- Each recharge extends SIM validity
- Top-up your data at convenience stores
in cash or by credit card online
Rechargeable data plans:
Plan/Validity
| 30 days | 60 days | 90 days | |
|---|---|---|---|
| 5GB | ¥990 | ¥1,815 | ¥1,925 |
| 10GB | ¥1,540 | ¥1,870 | ¥1,980 |
| 15GB | ¥2,200 | ¥2,365 | ¥2,475 |
| 25GB | ¥3,080 | ¥3,410 | ¥3,520 |
| 50GB | ¥4,576 | ¥4,697 | ¥4,807 |
| 100GB | ¥8,151 | ¥8,272 | ¥8,382 |
| 200GB | ¥14,630 | ¥14,795 | ¥14,905 |
| Plan/Validity | 5GB | 10GB | 15GB | 25GB | 50GB | 100GB | 200GB |
|---|---|---|---|---|---|---|---|
| 30 days | ¥990 | ¥1,540 | ¥2,200 | ¥3,080 | ¥4,576 | ¥8,151 | ¥14,630 |
| 60 days | ¥1,815 | ¥1,870 | ¥2,365 | ¥3,410 | ¥4,697 | ¥8,272 | ¥14,795 |
| 90 days | ¥1,925 | ¥1,980 | ¥2,475 | ¥3,520 | ¥4,807 | ¥8,382 | ¥14,905 |
eSIM or Physical SIM – Your Choice!
TOP SIM is available in both eSIM and traditional physical SIM card formats. You’ll get the same great speed and quality either way – the only difference is how you set it up.
With eSIM, there’s no need to insert or swap anything. Just scan a QR code and you’re good to go, all online.
Not sure if your phone supports eSIM? No worries – we’ve got you covered with a physical SIM too.
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eSIM
Buy eSIM- Get a QR code / activation code on your TOP SIM app
- No need to worry about losing or breaking a SIM card
- Eco-friendly – no plastic, no waste
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Physical SIM
Buy physical SIM- Get a physical SIM card delivered to you
- Insert it, set it up, and you're ready to go
- Works with almost any unlocked phone
Activation guide
Ready to activate? Choose the right guide below for your phone and SIM type.
Stay Connected Any Time with Rechargeable SIMs 📱
No registration or documents required. Pay in cash at any convenience store in Japan or by credit card online!
Interested in becoming a TOP SIM reseller?
Click the button below to discover the benefits and advantages of joining our reseller network!
Enjoy VoIP calls with "My 050" app
TOP SIM is a data-only SIM. For voice connectivity, explore our My 050 app!
With the My 050 app, you can make affordable calls within Japan and internationally. You can also apply for your own 050 number, allowing you to receive incoming calls directly in the app, along with a range of other benefits.
Message Board
[Maintenance Notice] SIM/eSIM activation and recharges will be unavailable due to system maintenance: Mar 25, 2026, 19:00 – 21:00 (JST).
Thank you for your understanding.
[Service Notice] TOP SIM Credit Card Recharge Temporarily Unavailable
Credit card payments for TOP SIM recharges and eSIM payments are temporarily disabled.
We are working to restore the service as soon as possible. In the meantime, please use cash payment at a convenience store (combini).
We sincerely apologize for the inconvenience caused.
[Service Notice] 3G (FOMA) Service Termination and Possible TOP SIM Connectivity Issues
The 3G (FOMA) service will end on March 31, 2026. During this transition period, some iPhone users may experience temporary network connectivity issues when using TOP SIM.
From March 1 to March 31, 2026, iPhone Air and iPhone 16e may connect only to 3G and be unable to use 4G (LTE) data.
From April 1, 2026, iPhones running iOS 26 or later may require a restart to connect to the network, and connection may take 1–2 minutes. If the connection is slow or unavailable, turning Airplane Mode ON and OFF may help.
If issues continue, please contact our support team.