NTT Docomo Business lowers IoT barriers with NaaS security

NTT Docomo Business has announced a new NaaS for IoT called “docomo business SIGN” and a new feature called “WAN Security” for its NaaS service “docomo business RINK,” which connects business locations.

NaaS (Network as a Service) allows for on-demand instant service launch and changes, optimizes costs through a subscription model, and offers integrated ICT functionality. NTT Docomo Business (formerly NTT Communications) is expanding its NaaS services. The company held a NaaS briefing on September 26, 2025, announcing the launch of its new IoT-oriented NaaS, “docomo business SIGN,” and the new WAN security feature of its NaaS service, “docomo business RINK,” which connects business locations. Hisashi Fujishima, Executive Vice President and General Manager of Cloud & Network Services at NTT Docomo Business’ Platform Services Division, explained, “We will incorporate our accumulated technology and experience in various fields, including data centers, cloud computing, security, networks, and mobile, into NaaS to provide highly convenient services.” “docomo business SIGN” Lowers the Barrier for Building IoT Systems with Built-in Security: NTT Docomo Business has previously offered NaaS services tailored to specific needs. “docomo business RINK” is an integrated network service connecting people and places, while “docomo business APN Plus powered by IOWN” is an IOWN APN dedicated line service with adjustable bandwidth. Starting in December 2025, “docomo business SIGN,” a service for IoT deployment, will be added to the NaaS lineup. Cyberattacks are increasing year by year, with attacks targeting IoT devices accounting for approximately 30% of all attacks. However, IoT devices have limited performance, making it difficult to incorporate security features.

Furthermore, IoT systems involve many technical components, making system construction challenging. Kazuo Komine, Executive Officer and General Manager of the 5G & IoT Services Department, Platform Services Division, NTT Docomo Business, stated, “Design and implementation present hurdles to building secure and useful IoT systems.” docomo business SIGN addresses these challenges. docomo business SIGN is a NaaS service that provides network and security for IoT. NaaS features are based on the previously released docomo business RINK features (including the new “WAN Security” feature described below), optimized for IoT. Komine cited three key features of the service. The first is “standard security features.” The service will provide a standard feature that detects unauthorized communications to malicious servers within the service network and remotely blocks SIM communications. This minimizes the damage caused by attacks by implementing countermeasures on the network side, rather than on IoT devices or the cloud. Furthermore, the “IoT SAFE” feature, which encrypts communications using a SIM applet (an embedded program running on the SIM) to prevent spoofing, is scheduled to be available by fiscal 2025. The second is the “optimized feature lineup.” The service will offer a wide range of features, including an IoT-specific mobile SIM card with Internet, closed network, and MEC connectivity, as well as sensor data visualization and analysis and video processing, allowing users to build optimal IoT systems.

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For example, if you want to build a location information system for your vehicle, you can select a low-capacity mobile line, utilize standard network security, use a closed network connection, and utilize mobility data visualization and analysis for data utilization. The third feature is the “template” function. To reduce the cost and effort of building a system, templates are provided that incorporate the necessary mobile lines and functions for standard configurations. Simply select a configuration such as “simple internet connection” or “closed network connection with multiple locations” from the web portal to immediately launch the system with standard settings. Examples of potential use cases for docomo business SIGN were presented, including remote centralized management of IoT devices installed in parking lots and theft prevention and comprehensive security enhancement for solar power generation systems using automatic analysis of surveillance camera images. docomo business SIGN service will begin in December 2025. It will be charged based on capacity, with low-capacity plans starting from a few hundred yen. docomo Business RINK to Detect Unauthorized Communications: WAN Security. In addition, docomo Business RINK, which has been available since 2023, will begin offering a new “WAN Security” feature on September 30, 2025. docomo Business RINK is a NaaS service that integrates security functions such as Internet gateways, remote access, IDaaS, CASB, and endpoints into WAN, interconnect, and mobile networks. WAN Security offers five features for monitoring and responding to threats in corporate communications. “This is a system that only a telecommunications carrier can achieve,” says Fujishima. The first feature is “Threat Detection,” which detects and blocks unauthorized communications. The second is “Behavior Detection,” which detects threats based on abnormal communication behavior (available in December 2025). The third is “Flow Collector,” which stores all communication logs in the cloud for long periods of time. The fourth is “Threat Information Sharing,” which shares detected threat information between companies (scheduled for availability in 2026). The last feature is a “Security Help Desk” that accepts inquiries regarding WAN security. The threat detection function sends an alert by email when it detects communication with a potentially dangerous site, and the communication can be immediately blocked via the web portal. Threats occurring at a branch can be handled centrally from headquarters. Of the 59 companies that have trialed this function to date, 10 have detected “suspicious communication,” and of those, 5 have confirmed a “high risk of infection.” Fujishima cited examples of WAN security use cases, such as threat countermeasures from the communication side for office equipment that cannot be equipped with EDR, and simultaneous notification of detection alerts between supply chain companies using threat information sharing. WAN security is provided at no initial cost, for a monthly fee of 2,600 yen (excluding tax) per branch. It can be implemented by applying via the web portal. Resolving issues of “business acceleration,” “cost optimization,” and “security governance” The docomo business SIGN and docomo businessRINK offers the NaaS features mentioned at the beginning: on-demand, subscription-based, and integrated ICT functionality.

Applications and configuration are completed via a web portal or API, and bandwidth changes and service start/stops are instantly reflected on demand. Subscriptions also prevent overinvestment and optimize costs and functionality. With docomo business RINK, various functions are available on a one-minute basis. Integrated ICT functions, including networking, security, IoT, and cloud services, are provided centrally, eliminating the need to procure individual functions. These functions are provided based on the diverse technologies and proven track record NTT docomo business has cultivated over many years. “These three NaaS features will contribute to solving management challenges such as accelerating business development, optimizing ICT costs, and strengthening security governance,” says Fujishima. NTT docomo business has set a sales target of 50 billion yen for docomo business SIGN over the five years since service launch, and 150 billion yen for docomo business RINK. Written by Yosuke Fukuzawa/TECH.ASCII.jp”We will incorporate the technology and track record we have cultivated in various fields, including mobile , into NaaS to provide highly convenient services,” he explained. “docomo business SIGN” lowers the barrier to building IoT systems with built-in security. NTT Docomo Business has previously offered NaaS services tailored to specific applications. These include “docomo business RINK,” an integrated network service connecting people and places, and “docomo business APN Plus powered by IOWN,” an IOWN APN dedicated line service with adjustable bandwidth. Starting in December 2025, “docomo business SIGN,” a service for IoT deployment, will be added to the NaaS lineup . Cyberattacks are increasing year by year, with approximately 30% of attacks targeting IoT devices. However, IoT devices have limited performance, making it difficult to incorporate security features. Furthermore, IoT systems require many technical components, making system construction challenging. Kazuo Komine, Executive Officer and General Manager of 5G & IoT Services, Platform Services Division, NTT Docomo Business, stated, “Design and implementation present hurdles to building secure and useful IoT systems.” docomo business SIGN addresses these challenges. docomo business SIGN is a NaaS service that provides networks and security for IoT. Each NaaS feature (including the new “WAN Security” feature described below) is optimized for IoT from the previously launched docomo business RINK. Komine cited three key features of the service. The first is “standard security functionality.” It provides a standard feature that detects unauthorized communications to malicious servers within the service network and remotely blocks SIM communications. This minimizes the damage caused by attacks by implementing countermeasures on the network side, rather than on IoT devices or the cloud.

Furthermore, the “IoT SAFE” feature, which encrypts communications using a SIM applet (an embedded program running on the SIM) to prevent spoofing, is scheduled to be available by fiscal 2025. The second is an “optimal feature lineup.” The service offers a wide range of features, including an IoT-specific mobile SIM card with Internet, private network, and MEC connectivity, sensor data visualization and analysis, and video processing, allowing users to build optimal IoT systems. For example, if you want to build a location information system for your vehicle, you can select a low-capacity mobile line, utilize standard network security, use a closed network connection, and utilize mobility data visualization and analysis for data utilization. The third feature is the “template” function. To reduce the cost and effort of building a system, templates are provided that incorporate the necessary mobile lines and functions for standard configurations. Simply select a configuration such as “simple internet connection” or “closed network connection with multiple locations” from the web portal to immediately launch the system with standard settings. Examples of potential use cases for docomo business SIGN were presented, including remote centralized management of IoT devices installed in parking lots and theft prevention and comprehensive security enhancement for solar power generation systems using automatic analysis of surveillance camera images. docomo business SIGN service will begin in December 2025. It will be charged based on capacity, with low-capacity plans starting from a few hundred yen. docomo Business RINK to Detect Unauthorized Communications: WAN Security. In addition, docomo Business RINK, which has been available since 2023, will begin offering a new “WAN Security” feature on September 30, 2025. docomo Business RINK is a NaaS service that integrates security functions such as Internet gateways, remote access, IDaaS, CASB, and endpoints into WAN, interconnect, and mobile networks. WAN Security offers five features for monitoring and responding to threats in corporate communications. “This is a system that only a telecommunications carrier can achieve,” says Fujishima. The first feature is “Threat Detection,” which detects and blocks unauthorized communications. The second is “Behavior Detection,” which detects threats based on abnormal communication behavior (available in December 2025). The third is “Flow Collector,” which stores all communication logs in the cloud for long periods of time. The fourth is “Threat Information Sharing,” which shares detected threat information between companies (scheduled for availability in 2026). The last feature is a “Security Help Desk” that accepts inquiries regarding WAN security. The threat detection function sends an alert by email when it detects communication with a highly dangerous site, and the communication can be immediately blocked from the web portal.

Threats that occur at bases can be dealt with centrally from headquarters, etc. So far, 59 companies have tried this function, and 10 have detected “suspicious communication,” and 5 of those have detected “high risk of infection. “Fujishima cited examples of WAN security use cases, such as threat prevention from the communications side for office equipment where EDR cannot be installed, and simultaneous notification of detection alerts between supply chain companies using threat information sharing. WAN security is offered at no initial cost, for a monthly fee of 2,600 yen (excluding tax) per location. It can be implemented by applying through a web portal. Solving challenges in “business acceleration,” “cost optimization,” and “security governance” As mentioned above, docomo business SIGN and docomo business RINK offer NaaS features, such as on-demand, subscription-based, and integrated ICT functionality. Applications and configuration are completed through a web portal or API, and bandwidth changes, service start/stops, and other changes are reflected immediately on demand. Subscriptions also reduce overinvestment and optimize costs and functionality.

With docomo business RINK, various functions can be used in one-minute increments. Furthermore, integrated ICT functions, such as network, security, IoT, and cloud, are provided centrally, eliminating the need to procure individual functions. These functions are provided by NTTドコモ事業 based on the diverse technologies and track record it has cultivated over many years. “These three features of NaaS will contribute to resolving management issues such as accelerating business development, optimizing ICT costs, and strengthening security governance,” says Fujishima. NTT Docomo Business has set a sales target of 50 billion yen in total over the five years from the launch of docomo business SIGN, and 150 billion yen in total over the five years for docomo business RINK.

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