eSIM Data 4G/5G – 50GB/month, monthly prepaid, dedicated for internet access — SB (SoftBank)
SB (SoftBank) eSIM, 50GB per month, using high-speed 4G/5G networks. Instantly activated via QR code – no physical SIM required, no need to visit a store.
✔ Initial fee (activation + first month): ¥5,500
✔ Monthly charge (from the 2nd month onward): ¥2,850, payment due on the 20th of each month
✔ Data allowance: 50GB/month
✔ Activation: Instant via QR code – no physical SIM required
✔ Supported network: SB 4G/5G, stable coverage across Japan
✔ Compatible devices: iPhone, Samsung Galaxy, Google Pixel, Sony Xperia, Oppo, Xiaomi, and other eSIM-compatible devices
✔ Customer support: English and Vietnamese available
✔ Target users: Those who need stable data for streaming, video calls, gaming, daily web browsing
SoftBank Japan eSIM 50GB/Month: Instant 4G/5G Data
Best Sellers
¥5,500
Pay with
VISA
Mastercard
JCB
AMEX
Konbini
Bank transfer
Cash on delivery
3Dセキュア 256-bit SSL暗号化通信
日本全国送料無料（一部対象商品）
日越二言語カスタマーサポート対応
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.