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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 market 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 Techniques and Case Studies for 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 various operations in different settings. In this column, we will not only introduce the features of each iPad model, recommended accessories, and useful business applications, but also present 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 feel free to download the PDF or contact us.*

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

Zero office attendance and "visualization" of inventory improve internal 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 employees who left the company, 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 has been organized, and the overall outlook for management tasks has greatly improved. [Challenges] - Checking the condition of returned devices, initializing and maintaining them, and managing storage. - While remote work is the norm, the person in charge continued 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 <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 PC, network, and business systems, leaving 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 <Telecommunications and Information Communication Business>

Outsourced the kitting operations and inquiry responses that were being handled in-house! The workload that was overwhelming has significantly decreased.

We would like to introduce a case study of the "Comprehensive Mobile Business Support Service (Marumo)" in the telecommunications and information communication 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 perform the previously time-consuming device configuration 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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[Case Study of Corporate Mobile Phones and Smartphones] BPO Services <Welfare and Care Support Services>

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

We would like to introduce a case study of the "Marugoto Mobile Business Support Service (Marumo)" implemented in the welfare equipment and home care support business. The company was considering vendors that could handle everything from device procurement, kitting, MDM operation support, to device storage in a seamless manner. After implementation, our staff, who have extensive expertise, responded to inquiries, enabling quick answers 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 burden on internal management departments - Workflow applications reduced to one-third of the previous volume *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 machines, 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. In the company, when a smartphone malfunction occurred, repair requests were made through the internal device management department via the telecommunications provider, but there were challenges such as the time-consuming process. After the implementation, by outsourcing the response contact point for malfunctions to our company, it became possible to handle repair requests from users, arrange for spare devices, and collect malfunctioning 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 environmental 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 setting and changing management information, 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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"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)" offers a smooth user experience with comfortable operability and long battery life, thanks to its fast chip and optimized battery, while supporting advanced features. It has improved drop resistance and effectively protects 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 to vividly capture 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 Businesses" that we offer. It features the A13 BIONIC chip, which delivers high processing power and graphic performance, along with a battery life that lasts all day. Additionally, the display is a vibrant 10.2 inches, providing an ideal visual experience for drawing beautiful illustrations, focusing on work, enjoying movies, and any other applications. 【Features】 ■ A13 BIONIC chip ■ 256GB of 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 audio data. You can listen to it again later. Additionally, when changing models, you can transfer the audio data recorded and saved on this product to a new model 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! Reduce the hassle of 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" bands in the 5G frequency range. 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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