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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)
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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) List of Products and Services

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46~56 item / All 56 items

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IP radio rental (nationwide) IP radio rental (nationwide)
Digital simple radio rental (1 to 5 km) Digital simple radio rental (1 to 5 km)
Income rental (50-300m) Income rental (50-300m)
Explosion-proof radio rental Explosion-proof radio rental
IP radio IP radio
Digital simple business radio Digital simple business radio
Specific low-power transceiver Specific low-power transceiver
Explosion-proof radio Explosion-proof radio
Corporate mobile phones, corporate smartphone-related products and services, etc. Corporate mobile phones, corporate smartphone-related products and services, etc.
Solution service products Solution service products
Examples of Utilizing Radios, Transceivers, and Intercoms Examples of Utilizing Radios, Transceivers, and Intercoms
Useful information about radios, transceivers, and intercoms. Useful information about radios, transceivers, and intercoms.
Corporate

Corporate mobile phones, corporate smartphone-related products and services, etc.

Santec Telecom Japan Co., Ltd. is an agency that boasts the top share in KDDI's Kanto corporate sales division. We can provide comprehensive support, from consulting on corporate communication environments to proposing office products and business improvement tools.

[Latest in 2025] Introducing business utilization methods and case studies for the iPad!

Introducing how the iPad can contribute to digital transformation, incorporating actual case studies from companies!

In the era of digital transformation, as companies are required to improve productivity and streamline operations, the iPad is gaining attention as a solution. Not only is it portable, but its excellent usability and the abundance of business-oriented applications support operations in various settings. In this column, we will introduce the features of each iPad model, recommended accessories, and useful applications for business, as well as specific examples of companies that have achieved digital transformation through the use of iPads. *For more detailed content of the column, you can view it through the related links. For more information, please download the PDF or feel free to contact us.*

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[Corporate Smartphone Implementation Case] BPO <Yoshizumi Holdings Co., Ltd.>

Zero office attendance and "visualization" of inventory improve employee satisfaction! A case where the burden of managing business smartphones was significantly reduced.

We would like to introduce a case study of the implementation of our BPO service "MaruMoba" at Yoshizumi Holdings, where business smartphones are utilized across many departments, from sales and consulting to engineering. Before the implementation, when devices were needed internally, initial setup and accessory preparation were carried out, and the devices were lent to users. When devices were returned by departing employees, their condition was checked, and they were initialized and maintained before being stored. Now, returned devices are sent directly to our company, and we have transitioned to a system that handles everything from condition checks to management and redistribution in one go. Inventory status is also visualized in real-time, the area around the cabinets is organized, and the overall outlook for management operations has greatly improved. [Challenges] - Checking the condition of returned devices, performing initialization and maintenance, and handling storage - While remote work is the focus, staff members were still required to come to the office once a week, leading to ongoing demands on their time. *For more details, please download the PDF or feel free to contact us.*

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[Case Study of Corporate Mobile Phones and Smartphones] BPO <Telecommunications and Information Communication Business>

Outsourced the kitting work and inquiry responses that were being handled in-house! The pressure of the workload has significantly decreased.

We would like to introduce a case study of the "Comprehensive Mobile Business Support Service (Marumo)" in the telecommunications and information communications industry. The company faced challenges such as wanting to manage mobile devices in bulk using a Mobile Device Management (MDM) system, but lacking personnel with the necessary knowledge in-house. After implementation, by using MDM to collectively handle the previously time-consuming device setup tasks, the delivery time was shortened, and smooth distribution of devices to each employee was achieved. [Case Overview] ■Challenges - Large-scale kitting is difficult - Lack of MDM knowledge is putting pressure on operations ■Effects - Significant reduction in errors - MDM professionals handled the situation, reducing the burden on the management department *For more details, please download the PDF or feel free to contact us.

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[Corporate Mobile Phone and Smartphone Implementation Case] BPO <Energy Solutions>

Leave all the kitting that was done in-house to us! Achieve shorter delivery times and a single point of contact.

We would like to introduce a case study of the "Comprehensive Mobile Business Support Service (Marumo)" in the energy solutions industry. The company faced challenges as they were overwhelmed with other tasks such as PCs, networks, and business systems, which left them unable to manage smartphone-related operations. After implementation, all individual kitting that was previously done in-house was entrusted to us. By shipping directly to users without going through the management department, we were able to shorten delivery times. 【Case Overview】 ■Challenges - Wanted to delegate management tasks and consolidate requests and inquiries - Business operations were being strained ■Effects - Significant reduction in errors - Easier progress and management checks, reducing the burden on the management department *For more details, please download the PDF or feel free to contact us.

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[Case Study of Corporate Mobile Phones and Smartphones] BPO Services <Building Comprehensive Management>

One-stop service for accepting repair requests from users, arranging spare units, and collecting faulty equipment!

We would like to introduce a case study of the "Comprehensive Mobile Business Support Service (Marumo)" and "STJ Fault Support (i) 1 Year" in building comprehensive management. The company previously submitted repair requests through the internal device management department via the telecommunications provider when smartphones malfunctioned, but faced challenges such as time consumption. After implementation, by outsourcing the fault response contact point to our company, it became possible to handle repair reception from users, arrange spare devices, and collect faulty equipment in a one-stop manner. [Case Overview] ■Challenges - Need to reduce processes - Lack of knowledge about MDM, leading to operational pressure ■Effects - One-stop response - MDM professionals handle the situation, reducing the burden on the management department *For more details, please download the PDF or feel free to contact us.

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[Case Study of Corporate Mobile Phones and Smartphones] BPO Services <Machined Products Business>

Remote management using MDM has dramatically improved work efficiency and reduced the burden on the management department!

We would like to introduce case studies of the "Comprehensive Mobile Business Support Service (Marumo)" and "OptimalBiz (MDM)" in the machine processing business. The company contracted an MDM provided by a telecommunications carrier when introducing business terminals, but faced challenges such as lacking the know-how for environment setup, which limited its utilization. After implementation, by utilizing MDM operation support, they achieved reliable operation with comprehensive support. Tasks that are prone to occur, such as settings and management information changes, can now be completed in-house. [Case Overview] ■Challenges - Difficulties in managing devices - Lack of knowledge about MDM ■Effects - Automation with MDM tools - Support from MDM professionals *For more details, please download the PDF or feel free to contact us.

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[Case Study on Corporate Mobile Phones and Smartphones] BPO Services <Welfare and Care Support Services>

By receiving inquiries from each employee, our company achieves prompt responses and early resolutions!

We would like to introduce a case study of the "Marugoto Mobile Business Support Service (Marumo)" implemented in welfare equipment and home care support services. The company was considering vendors that could provide comprehensive support, from device procurement and kitting to MDM operation support and device storage. After implementation, our staff, who have extensive expertise, handled inquiries, resulting in quick responses and early resolutions to questions that previously took time to address. [Case Overview] ■ Challenges - Setting up, procuring, and managing business devices ■ Effects - Improvement in internal service levels - Reduction of the burden on internal management departments - Workflow applications decreased to one-third of the previous volume *For more details, please download the PDF or feel free to contact us.

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"Discontinued" Corporate Mobile Phone / Corporate Smartphone 'iPhone SE 3rd Generation'

Finally 5G compatible! You can easily get the power you've wanted.

The "iPhone SE (3rd generation)" achieves comfortable operability and long battery life through a high-speed chip and battery optimization, providing a smooth user experience that supports advanced features. The drop resistance has been improved, firmly protecting the device from scratches and scuffs. With splash and dust resistance, you can feel secure even if you spill a drink, supporting your active daily life. 【Features】 ■ Equipped with a super-fast processor ■ Long-lasting operation with a large-capacity battery ■ Supports high-speed communication ■ High-performance camera vividly captures memories ■ Advanced technology condensed into a compact body *For more details, please download the PDF or feel free to contact us.

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"Discontinued" Corporate Mobile Phones, Corporate Smartphones, Corporate Devices 'iPad 9th Generation'

Provides reliable performance in various situations such as creative work and jobs!

We would like to introduce the "iPad 9th Generation for Corporations" that we handle. Equipped with the A13 BIONIC chip, it offers high processing power and graphic performance, along with a battery life that lasts all day. Additionally, the display features a vivid 10.2-inch screen, providing an ideal visual experience for drawing beautiful illustrations, focusing on work, enjoying movies, or any other purpose. 【Features】 ■ A13 BIONIC chip ■ 256GB large storage capacity ■ Wide-angle camera with center frame support ■ Enjoy handwriting and typing freely ■ Expands new experiences wirelessly *For more details, please download the PDF or feel free to contact us.

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"Discontinued" Corporate Mobile Phone / Corporate Device 'GRATINA (KYF42)'

Excellent call quality and reliable recording features! Customizable to suit your preferred sound quality for easy listening.

The "GRATINA" is a standard mobile phone that can be used for a long time in business. When a call ends, the content of the previous call is saved as voice data. You can listen to it again later. Additionally, when changing models, you can transfer the recorded and saved voice data from this product to a new device using a microSD memory card (sold separately). 【Features】 ■ Save and output important call records ■ Various functions to ensure you don't miss incoming calls ■ Clear audio quality ■ Durable for long-term use ■ Security measures with a model that has no camera *For more details, please download the PDF or feel free to contact us.

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"Discontinued" Wi-Fi Router Speed Wi-Fi 5G

Achieve high-speed communication with a hybrid network of 4G and 5G! It is possible to reduce the effort required for line arrangement.

The "Speed Wi-Fi 5G X01" is a Wi-Fi router that supports a hybrid network of 4G and 5G, compatible with both "Sub6" and "millimeter wave" frequencies in the 5G spectrum. It has a built-in 2.5GBASE-T wired LAN port, eliminating the need for a cradle. You can utilize high-speed communication in various locations and situations. Additionally, by connecting a business camera to the X01 with a single LAN cable, you can reliably stream 4K video. This ensures that video and audio are delivered to viewers without interruption. 【Features】 ■ 5G-compatible Wi-Fi router ■ Built-in multi-gigabit wired LAN port for experiencing high-speed communication ■ Utilizes Wi-Fi 6 and USB 3.0 (Type-C) to enable various connection methods for 5G *For more details, please download the PDF or feel free to contact us.

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