シンガポール・マレーシア・タイ・インドネシア・ベトナム・中国本土・日本・韓国・マカオ・台湾・香港の11カ国・地域で合計1GBのデータ通信が可能です。対応ネットワーク：シンガポール（Singtel）、マレーシア（Celcom/Digi/Maxis）、タイ（TRUE/DTAC）、インドネシア（Telkomsel/XL）、ベトナム（Viettel/Vinaphone/MOBIFONE）、中国本土（CMCC）、日本（KDDI/SoftBank）、韓国（LG/SKT）、マカオ（CTM）、台湾（Chunghwa）、香港（CMHK）。利用期間をお選びいただき、お支払い後にメールで届くeSIMのQRコードで簡単に開通できます。
【アジア11カ国・地域 eSIM】総容量1GB｜即日開通・契約なし｜QRコードで設定
eSIM > Asia 11 Countries > Total Data
¥380
Select 利用期間
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
Get online in 3 simple steps
Instant digital delivery. Scan your QR code and connect in minutes.
Choose your plan
Select your trip duration and data allowance, then checkout online.
Receive your QR code
Receive your digital activation QR code by email within minutes. No shipping wait.
Scan and connect
Scan the QR code in phone settings and get online right after arrival.
What you get
Delivery
Instant QR code (via Email)
Network
Japan 4G / 5G (KDDI & SoftBank)
Tethering
Supported (Free hotspot sharing)
Calls / SMS
Data only (App VoIP calling)
Device support
eSIM-capable unlocked phones
Contract
None (Prepaid lock-free)
Why choose C.T.S
C.T.S eSIM
Typical carrier SIM
Activation speed
Instant QR scan
Shop visit or shipping wait
Paperwork / ID check
None required
Strict Japanese ID check
Contract period
None (Prepaid lock-free)
1–2 years lock-in + fee
Support languages
English, Japanese & Multilingual
Japanese only
*Based on our 2026 research comparing contract terms, setup fees, and cancellation policies.
Real people, real eSIMs
Instant setup & helpful support for your stay in Japan.
★ 4.9/5.0
·
98.4% Customer Satisfaction
·
Saitama Bilingual Support
“Always providing the best support. Truly appreciate the helpful and friendly care.”
Response time was super fast. Whenever I had questions navigating mobile connectivity in Japan, the support team patiently helped me until everything was settled.
“Extremely satisfied with the service. Will definitely recommend to friends needing a SIM!”
Clear registration steps and very polite staff. I feel 100% confident recommending C.T.S to students and co-workers moving to Japan.
“Setup was smooth and ready in minutes. Strong network coverage and great service.”
Followed the simple step-by-step guide and internet was working right away. Rock-solid connection on the nationwide SoftBank network.
“5 stars isn't enough, I'd give 10 out of 5 stars for the extraordinary help!”
When I had a mix-up with the delivery locker at my building, support immediately contacted the courier service to ensure my package arrived safely.
“Pre-order guidance was super helpful and warm. A reassuring 5-star experience.”
They explained the data allowance plans and group bundle discounts clearly so I could make the best choice without hesitation.
Questions before you buy
Need help with compatibility, activation or your QR code?
Dial *#06# on your phone. If an EID number appears and your device is carrier-unlocked, it supports eSIM.
Your QR code is generated and delivered automatically to your email within minutes after checkout.
Yes! Dual-SIM phones allow keeping your home SIM active for SMS/OTP while using C.T.S eSIM for local Japan mobile data.
Validity starts only when your eSIM connects to a supported local network in Japan, not when scanned.
Yes, personal hotspot (tethering) is fully supported for laptops and tablets at no extra charge.
Japan eSIM. Online in minutes.
No shipping wait. Scan your QR code and connect instantly across Japan.