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.
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: Stay connected, stress-free.
With TOP SIM’s rechargeable eSIM, you can activate mobile service instantly – no delivery, no SIM swap. Whether you're visiting or living in Japan, enjoy fast, flexible, and reliable connectivity.
Rechargeable data plans:
| 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 |
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 |
* An issuance fee (¥330) will be charged only once.
How to order and activate the eSIM
Follow these simple steps to get started.
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Download the app
Follow the instructions on the app to purchase a plan
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Make the payment
Show the payment barcode on your smartphone to the store clerk in a convenience store or pay online with your credit card.
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Activate your eSIM
You'll receive a QR code to activate your eSIM and get connected in minutes.
eSIM Activation Guide
Download the TOP SIM app to activate your eSIM
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Install the TOP SIM App
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Choose your data plan
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Make the payment
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Set up your device
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You're all set!
iOS
Android
Why to choose TOP SIM?
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Instant Activation
Activate & connect in minutes – no waiting.
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Multi-Language Support
Get support in over 15 languages.
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Recharge & Reuse
No need to buy a new eSIM — just recharge and go.
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Easy Payment
Pay your way: convenience stores, credit card, or cashless options.
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Best Local Coverage
Powered by docomo — Japan’s top-tier mobile network.
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Eco-Friendly Choice
eSIM means no plastic waste — a greener way to stay connected.
