Download the app and choose a data plan that works best for you.
Download the app and choose a data plan that works best for you.
Prepaid SIM & eSIM in Japan
No monthly fees. No wasted data. Choose the data plan you need, whenever you need it. Each recharge extends your SIM’s expiry date, and your unused data carries over for up to 180 days.
Most prepaid SIMs have an expiry date. With TOP SIM, every recharge extends your expiry date.
Recharge once — it moves forward. Recharge again — it moves forward again. There’s no limit to how many times you can extend it. No need to buy a new SIM just because a fixed validity period has ended.
| Plan / Validity | 5GB | 10GB | 15GB | 25GB | 50GB | 100GB | 200GB |
|---|---|---|---|---|---|---|---|
| 30 days | ¥990 Best starter option | ¥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 |
| Going from 60 days to 90 days costs just +¥110 — for every data size. The more data you buy, the better value the 90-day plan becomes. | |||||||
| Plan / Validity | 30 days | 60 days | 90 days |
|---|---|---|---|
| 5GB | ¥990 Best starter option | ¥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 |
| Going from 60 days to 90 days costs just +¥110 — for every data size. The more data you buy, the better value the 90-day plan becomes. | |||
7 data sizes × 3 validity periods — 21 plans to choose from. Pick what you need with every recharge. 100GB last month, 5GB this month? No problem. (Prices include tax.)
comparison
Not all prepaid SIMs work the same way. With TOP SIM, you have more flexibility over when you recharge, how much data you choose, and how long your SIM stays active.
| TOP SIM | Monthly contract SIM | Typical prepaid SIM | |
|---|---|---|---|
| When you pay | ◎Only when you recharge. Months you don't use it cost you ¥0. |
△Monthly billing. You pay a fixed fee every month, even if you barely use the data. |
◯Pay per purchase. Plan options may be more limited. |
| Choosing a plan | ◎Super flexible! Pick any plan any time: from 5GB to 200GB for 30, 60 or 90 days. |
△Plan changes may require an application and may not take effect immediately. | △Less flexibility. Data allowances and validity periods are often predetermined. |
| SIM validity | ◎Extended with every recharge. Recharge to keep your SIM active for longer. |
✕No fixed prepaid validity period. Your service continues while your contract remains active. |
△Limited validity. Extension may not be available or may be restricted. |
| Unused data | ◎Carry it over for up to 180 days. | △Usually only until the end of the following month. | ✕Often expires with the plan. |
| Getting started | ◎No credit check. No application is required. Choose a physical SIM or eSIM and get connected without a monthly contract. |
△An application and credit screening are generally required. Activation can take days. |
◯A credit check is generally not required. |
| How you pay | ◎Cash payment available at convenience stores. International credit cards are accepted for online payments. |
△A credit card or Japanese bank account is normally required. | ◯Pay when you purchase. |
| When you stop using SIM | ◎Nothing to cancel. Simply stop recharging. |
△Cancellation is required to end the contract and billing. | ◯ Nothing to cancel in most cases. |
Real-life scenarios
See how TOP SIM compares in real-life situations.
You may travel for work or spend a few months back home. With a monthly contract, you keep paying even while you’re away. With TOP SIM, there’s no monthly fee — simply recharge when you need data.
You bought 5GB and used 3GB. With TOP SIM, the remaining 2GB doesn’t go to waste. Recharge and your unused data carries over for up to 180 days.
Use your data when you need it — not just because it’s about to expire.
No credit card. No Japanese bank account. No credit screening. TOP SIM is prepaid, so you can get connected without applying for a monthly mobile contract.
Choose a physical SIM or eSIM.With eSIM, there’s no need to wait for delivery. No credit check either way.
Identity Check not required.No paperwork or in-person application is required. Just download the app and start using right away!
Get connected!Once your SIM is activated, you’re ready to use your data.Pay your way. Pay in cash at 7-Eleven, FamilyMart, Lawson, MINISTOP, Seicomart, or stores with MMK terminals. Credit card payments are also available in the app.
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.
Activation guide
eSIM for use in Japan only
Tap “Invite a Friend” to share your code and get free data!
★ You: 5GB FREE after your friend's eSIM purchase and first recharge.
★ Friend: 1GB FREE after eSIM activation.
eSIM for use in Japan only
Tap “Invite a Friend” to share your code and get free data!
★ You: 5GB FREE after your friend's eSIM purchase and first recharge.
★ Friend: 1GB FREE after eSIM activation.
for resellers
No registration or documents required. Pay in cash at any convenience store in Japan or by credit card online!
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.
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