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  3. STJグループ(株式会社サンテレコムジャパン、株式会社STJレンテック)
Trading company/Wholesale
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STJグループ(株式会社サンテレコムジャパン、株式会社STJレンテック)

EstablishmentSeptember 21, 1989
capital12000Ten thousand
number of employees70
addressTokyo/Minato-ku/2-2-6 Kaigan, DS Kaigan Building 7F, 8F
phone0120-984-875
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last updated:Aug 06, 2025
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STJグループ(株式会社サンテレコムジャパン、株式会社STJレンテック) Company Profile

Leave the rental and sales of radios, transceivers, and intercoms, as well as information and communication devices like corporate mobile phones and smartphones, to the STJ Group!

The STJ Group (Suntelcom Japan Co., Ltd. and STJ Rentec Co., Ltd.) specializes in the sales, rental, and maintenance of wireless equipment and related solution products. (e.g., business-use wireless devices, IP wireless devices, license-free specific low-power transceivers, solutions products such as cameras and relay devices) ~List of Locations~ ■ Hokkaido Sales Office / Experience Center Sapporo ■ Tohoku Sales Office ■ Kanto Sales Office (Head Office) / Experience Center Tokyo ■ Kansai Branch / Experience Center Osaka ■ Kyushu Sales Office Additionally, the group company Suntelcom Japan Co., Ltd. also engages in mobile corporate business. With a proven track record in major corporate BCP implementations, we provide BPO services where Suntelcom Japan serves as the customer contact point, offering support for bulk management of devices, as well as assistance for malfunctions and losses. We can also provide comprehensive support proposals, including consulting on corporate communication environments and suggestions for office products and business improvement tools.

Business Activities

1) Import and export of telecommunications equipment and peripheral devices 2) Design and customization of mobile communication systems 3) Sales of mobile terminals and systems for mobile communication service providers 4) Maintenance management services for mobile communication service providers 5) Application development for mobile communications 6) Licensing and standardization of telecommunications equipment 7) System integration for enterprises

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Transceiver Rental - Transceiver & Smartphone Rental Shop

Transceiver Rental - Transceiver & Smartphone Rental Shop

Grand opening on January 26, 2026! A special opening commemorative campaign will also be held.

We are pleased to announce the opening of the "Walkie-Talkie & Smartphone Rental Shop," which can be used in various scenes such as events, construction sites, and disaster prevention training. The shop will open in Sapporo, Tokyo, and Osaka, with a reception counter also established in Hakata. A grand opening campaign is scheduled to run until March 31, 2026. Make your events, festivals, and sports competitions more comfortable. The more units you rent, the more advantageous it is. Please act quickly. 【Three Points That STJ Rentec Can Offer】 ■ With a physical store, we can provide same-day support and shipping, ensuring peace of mind in emergencies. ■ You can see, try, and consult about walkie-talkies directly at the store. ■ With 50 years of experience solely in radio equipment, you can consult us about anything related to radios. *For more details, please download the PDF or feel free to contact us.

Products/Services (407)

[Column] How to Choose a Hands-Free Compatible Transceiver! product image
[Column] How to Choose a Hands-Free Compatible Transceiver!
[Wireless Equipment Rental Case] Professional Basketball *Smooth Communication product image
[Wireless Equipment Rental Case] Professional Basketball *Smooth Communication
[Radio Rental Case] Events and Festivals *Interference Countermeasures product image
[Radio Rental Case] Events and Festivals *Interference Countermeasures
Vehicle-mounted IP radio/IP transceiver 'SRNX100' product image
Vehicle-mounted IP radio/IP transceiver 'SRNX100'

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catalog(255)

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Digital Simple Business Radio 'SRD580'

Digital Simple Business Radio 'SRD580'

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Computer rental service

Computer rental service

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Digital Simple Business Radio 'SRD790/SRD795(-BT)'

Digital Simple Business Radio 'SRD790/SRD795(-BT)'

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Announcement of the release of "eYACHO for Business 7"

Announcement of the release of "eYACHO for Business 7"

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news(22)

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2025 First Half KDDI Office Company Sales Contest 1st Place Award

  • COMPANY

We are pleased to announce that our company has achieved first place in the solution product sales category at the KDDI Office Sales Contest for the first half of fiscal year 2025. This award is entirely thanks to the support and patronage of our customers, for which we are sincerely grateful. We will continue to strive to improve service quality and provide valuable proposals to meet your expectations. We kindly ask for your continued support and patronage. Thank you very much.

Jan 23, 2026

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【1/26 OPEN!】Transceiver & Smartphone Rental Shop

  • COMPANY

As the new year begins, I would like to extend my heartfelt congratulations on your continued prosperity. I sincerely appreciate your exceptional support throughout the year. This is the STJ Group (Santelecom Japan, STJ Rentec). Now, I am pleased to announce that we will be opening our "Transceiver & Smartphone Rental Shop" simultaneously at three locations nationwide on January 26 (Monday)! ■ List of Services to be Offered - Same-day pickup/return of rental equipment - Usage explanations and demonstrations of rental equipment - Wireless solutions consultation desk - Mobile BPO service counter As a special promotion to celebrate the opening of the rental shop, we are currently running a special price campaign for picking up rental equipment at the shop! For more details, please contact us!

Dec 26, 2025

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Notice of Year-End and New Year Holidays for the STJ Group in 2025

  • COMPANY

Thank you very much for your continued support. At STJ Group (Santec Telecom Japan Co., Ltd. and STJ Rentech Co., Ltd.), we regret to inform you that our year-end and New Year holiday schedule will be as follows. We apologize for any inconvenience this may cause and appreciate your understanding. ■ Year-End and New Year Holiday Schedule From Tuesday, December 30, 2025, to Sunday, January 4, 2026 * Last acceptance date for the year: Thursday, December 25 * Last shipping date for the year: Friday, December 26 * Monday, December 29, is the last business day of the year. Inquiries and consultations will be accepted. ■ Business Resumption Date Starting Monday, January 5, 2026 During this period, we anticipate significant delays in sales and other responses due to manufacturer holidays. We apologize for any inconvenience and appreciate your understanding. Regarding inquiries made via the web, we will respond after Monday, January 5, 2026. Thank you for your understanding in advance. Our website will still be available for use during the holiday period. We look forward to your continued patronage next year.

Dec 25, 2025

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Detailed information

Company name STJグループ(株式会社サンテレコムジャパン、株式会社STJレンテック)
number of employees70
Contact addresspostalcode 105-0022 Tokyo/ Minato-ku/ 2-2-6 Kaigan, DS Kaigan Building 7F, 8FView on map TEL:0120-984-875 FAX:-
Key PartnersMotorola Solutions, Inc. Icom Inc. Yaesu Musen Co., Ltd. JVC Kenwood Corporation Alinco Inc. MC Access Support, Inc. Smartwave Telecommunications, Inc. Nihon Antenna Co., Ltd. KDDI Corporation NTT Docomo, Inc. SoftBank Mobile Corp. ITX Communications, Inc. J-Mobile, Inc. MetaMoJi Corporation L is B, Inc. Others
Business LocationsClick here for the list
Industry Trading company/Wholesale
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