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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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  • Products/Services(413)
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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 Overview

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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Products/Services (413)

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Is it dangerous to use second-hand devices for corporate smartphones? Points to be aware of when implementing. product image
Is it dangerous to use second-hand devices for corporate smartphones? Points to be aware of when implementing.
Corporate mobile phone, smartphone, device 'DIGNO(R)SX4 KC-S305' product image
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A clear explanation of the mechanisms and types of wireless antennas, as well as the characteristics of radio waves. product image
A clear explanation of the mechanisms and types of wireless antennas, as well as the characteristics of radio waves.

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catalog(259)

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Catalog for Specific Low Power Transceiver / No License Required 'SRFD1'

Catalog for Specific Low Power Transceiver / No License Required 'SRFD1'

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Specific Low Power Transceiver / No License Required 'SRFD1' Manual

Specific Low Power Transceiver / No License Required 'SRFD1' Manual

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Specific Low Power Transceiver / No License Required 'SRS90/SRS95' Manual

Specific Low Power Transceiver / No License Required 'SRS90/SRS95' Manual

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Specific Low Power Transceiver / No License Required 'SRS90/SRS95' Catalog

Specific Low Power Transceiver / No License Required 'SRS90/SRS95' Catalog

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news(23)

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We will be exhibiting at "Japan IT Week" from April 8 (Wednesday) to April 10 (Friday), 2026!

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We will be exhibiting at "Japan IT Week" held at Tokyo Big Sight. At our booth, we will be introducing our mobile BPO service for businesses, "MaruMoba." Our professional staff will handle device management, setup, repairs, loss response, and user support all at once, significantly reducing your operational burden. We understand you are busy, but we kindly ask you to come together and visit us. ================================================= 1. Date and Time 【Schedule】April 8 (Wed) to April 10 (Fri), 2026, for 3 days 【Hours】10:00 AM to 5:00 PM 2. Venue 3-11-1 Ariake, Koto-ku, Tokyo 135-0063 Tokyo Big Sight East 1-3, 7, 8, West 1-4 3. Admission Complete pre-registration required (please check the exhibition website below for details) ================================================ We sincerely look forward to your visit.

Feb 26, 2026

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

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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

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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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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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