C.T.S Co., Ltd. (CTS Co., Ltd.) is a Japan-registered telecommunications company providing SIM cards, eSIM, Pocket WiFi, and Home WiFi services for foreigners in Japan. Headquartered in Kawaguchi, Saitama, we have served 10,000+ international customers since 2019.
We are an official partner of Japan's leading mobile network operators - SoftBank, NTT Docomo, Rakuten Mobile, and KDDI au - providing direct network access with no third-party routing.
What We Offer
- eSIM - Instant QR code activation, plans from 1 day to monthly. From 500 yen. Browse eSIM
- Data SIM - Physical SIM, 1GB to unlimited, Walang kontrata. From 460 yen/month. Browse Data SIM
- Call & Data SIM - Japanese phone number + data + calls. From 980 yen/month. Browse Call & Data SIM
- Pocket WiFi - Portable router, 10+ devices, Unli Data. From 4,800 yen/month. Browse WiFi
- Home WiFi - 5G home internet, 30 devices, plug & play. From 5,200 yen/month.
Why 10,000+ Customers Choose C.T.S
- Japan-registered company - Corporate number 0400-01-110329, Telecom license A-01-17459
- Multilingual support - English, Vietnamese, Indonesian, Burmese, Thai, Japanese
- Walang kontrata - Prepaid monthly plans, cancel anytime
- Free shipping - Across all of Japan
- Flexible payment - Credit cards, SmartPit, PayPay, LINE Pay, bank transfer
Connect With Us
Facebook · Instagram · TikTok · YouTube
Company Profile
Company Name: C.T.S Co., Ltd. |
Telecommunications Business Notification Number: A-01-17459 |
Secondhand Dealer License: Saitama Prefectural Public Safety Commission License No. 431030070084 |
Established: August 5, 2019 |
Officer: Representative Director Nguyen Quoc Thao (Suzuki Tao) |
Capital: 5,000,000 yen |
Address: Head Office, 401 Kowloon Building, 2-41-9 Namiki, Kawaguchi-shi, Saitama 332-0034 |
Business Activities: Budget SIM and voice line sales Pocket WiFi sales Moving services Used PC and used smartphone sales |
Number of Employees: 8 (as of October 2022) |
Main Bank: Rakuten Bank |
TEL-FAX: 048-278-4612 |
EMAIL: kanri@cts-world.jp |