Prepaid 4G LTE Unlimited Data SIM – monthly prepaid, dedicated for internet access — Rakuten Mobile
Rakuten Mobile SIM with unlimited data, monthly prepaid plan, no contract required. Suitable for international students, long-term foreign residents, and heavy data users. Nationwide coverage in Japan, stable connection, high-speed. Activated same day – just insert the SIM and start using it.
✔ Data allowance: Unlimited
✔ Initial fee (registration + first month): ¥5,500
✔ Monthly charge (from the 2nd month onward): ¥3,980 (tax included)
✔ Billing cycle: 20th–25th of each month
✔ Contract: Not required
✔ Supported network: Rakuten 4G LTE (including partner roaming areas)
✔ Compatible devices: SIM-free smartphones, pocket Wi-Fi
✔ Data top-up: Available via online recharge each month
✔ Target users: International students, long-term foreign residents, heavy data users
Rakuten prepaid data SIM – Unlimited data, 4G LTE network, dedicated for internet access
sim
¥7,980
¥8,980
Pay with
VISA
Mastercard
JCB
AMEX
Konbini
Bank transfer
Cash on delivery
3D Secure 256-bit SSL Encryption
Free Nationwide Shipping Across Japan (On Select Products)
Bilingual Customer Support
Online in 3 simple steps
No shop visit, no Japanese paperwork stress.
1
Order in 2 minutes
Pick your plan and pay by card, at a konbini, by bank transfer or cash on delivery.
2
Receive it at home
Your SIM arrives by post with a setup guide in English and Japanese.
3
Insert and go
Put the SIM in your phone or router, follow the APN guide, and get online.
What you get
NetworkSoftBank 4G LTE
High-speed data50GB per month
After 50GBSpeed limit may apply
Calls / SMSData only
SIM sizeNano / Micro / Standard
ContractNone
Monthly payment20th–25th of each month
Why choose C.T.S
C.T.S Data SIM
Typical contract plan
Contract
None
Often required
How to start
Delivered to your door
Visit a shop
Support language
English & Japanese
Mostly Japanese
Payment
Card, konbini, bank, cash
Card or bank account
General comparison. [Verify each row before publishing.]
Real people, real SIMs
Every order is packed by our team in Saitama.
[Photo: team packing orders]
★★★★★
"A simple way to get connected in Japan."
★★★★★
"Clear setup and helpful support when I needed it."
[UGC: customer connected in Japan]
Questions before you buy
Still unsure? Our team answers in English and Japanese.
You pay ¥5,500 today, which covers activation and your first month. After that the plan is ¥2,850 per month (tax included).
Once you reach 50GB, your connection continues at a throttled speed until the next monthly cycle.
Compatible with SIM-free smartphones, mobile pocket WiFi devices and tablets supporting Japan LTE bands.
Cash payment is supported through the payment methods available at checkout.