NEC Networks & System Integration Corp.

NEC Networks & System Integration Corporation (often shortened to NEC Netsu, or NESIC) is a Japanese information and communications technology (ICT) services company and a consolidated subsidiary of NEC Corporation. Its business centres on designing, building and operating IT and network infrastructure for enterprises, public-sector bodies and telecommunications carriers: network integration, system integration, data-centre and cloud services, outsourcing and managed operations, and the sale and maintenance of ICT equipment. Rather than a consumer brand, it is a business-to-business engineering and services house whose name carries the NEC corporate brand into large-scale network and systems projects in Japan. The company's roots go back to the post-war Japanese telecommunications-engineering tradition, and it was built up inside the NEC group as a dedicated network-engineering and systems-integration arm. Over the decades it grew from installing telephone and enterprise network equipment into a broad ICT services provider, adding system integration, outsourcing, contact-centre and network-monitoring services, and later cloud, security and workplace/digital-transformation solutions. It has long been one of the NEC group's principal domestic services companies, working closely with NEC's hardware and platform businesses while serving customers directly. For much of its history NEC Networks & System Integration was a separately listed company on the Tokyo Stock Exchange, which gave it a visible public profile among Japanese IT-services firms. NEC Corporation later moved to take full ownership, making it a wholly owned subsidiary and delisting its shares, so that the network and systems-integration business could be run as an integrated part of the group's ICT services strategy. Today it operates mainly in the Japanese market, positioning itself as an end-to-end partner for network and IT infrastructure — from design and construction through operation and support — under the NEC brand. Because the company is a B2B services subsidiary, its public profile is lower than NEC's consumer and hardware brands, and its visibility comes chiefly through contracts, group disclosures and its role in NEC's digital-transformation and network offerings. The brand's equity rests on the NEC name, on long-standing relationships with Japanese enterprises and public organisations, and on its engineering and operational capabilities in networks and systems integration.

NEC Networks & System Integration Corporation emerged from the telecommunications-engineering tradition of the NEC group in post-war Japan. NEC itself was founded in 1899 as a joint venture with Western Electric, and through the twentieth century it became one of Japan's leading suppliers of telecommunications equipment and computers. As Japanese enterprises and carriers built out their telephone and data networks, a dedicated engineering and construction capability was needed to install, integrate and maintain that equipment — the activity that would become NEC Networks & System Integration. The company's formal origins are usually dated to the early 1950s, when the network-engineering and installation business was organised as a distinct entity within the NEC sphere. Over the following decades it expanded from installing telephone exchange and enterprise network equipment into broader systems integration: building local- and wide-area networks, integrating servers and software, and taking on the operation of customer IT environments through outsourcing contracts. This shift mirrored the broader evolution of the Japanese IT-services industry, in which equipment vendors spun out service and integration arms to serve large enterprises and public bodies. By the 1990s and 2000s the company had become one of the NEC group's principal domestic ICT services companies, with a portfolio spanning network integration, system integration, outsourcing, contact-centre operations and network monitoring. It was listed on the Tokyo Stock Exchange, giving it an independent public profile and its own investor base, while remaining closely tied to NEC's hardware, software and platform businesses. The brand was marketed in Japan as NEC Netsu, and its engineering reputation rested on large-scale network construction for carriers and enterprises. As cloud computing, security and digital transformation reshaped the Japanese IT market in the 2010s, the company extended its offerings into cloud integration, cybersecurity, workplace modernisation and managed services, positioning itself as an end-to-end ICT partner rather than a pure equipment installer. NEC Corporation, seeking to integrate its services businesses more tightly, moved to take full ownership of the company; it became a consolidated, wholly owned subsidiary and its shares were delisted from the Tokyo Stock Exchange. Since then it has operated as the group's network and systems-integration arm, serving Japanese enterprises, public-sector organisations and telecommunications carriers under the NEC brand.

• Network-engineering and installation business organised as a distinct entity within the NEC group

• Expansion from equipment installation into systems integration and IT outsourcing

• Listed on the Tokyo Stock Exchange as an independent NEC group services company

• Extended offerings into cloud, security and digital-transformation services

• Became a wholly owned subsidiary of NEC Corporation and was delisted

B2B ICT infrastructure and network-integration partner within the NEC group, focused on the Japanese enterprise and public-sector market.

• Network integration

• System integration

• ICT outsourcing and managed services

• Cloud and security integration

• Contact-centre and network-monitoring services

• 2026-08-27

  NEC and partners launch NEC Cyber Secure Package powered by CyIOC[1]NEC及其合作伙伴推出基于CyIOC的NEC Cyber Secure Packagejp.ibtimes.com

  Reported: 2026-08-27

  NEC Corp., NEC Networks & System Integration Corp., Digital Arts Inc. and FFRI Security Inc. jointly developed and announced on August 27 a supply chain cybersecurity service branded "NEC Cyber Secure Package powered by CyIOC," combining web access control, cloud-use management, EDR and 24/7 SOC monitoring. Sales are set to begin on August 31 at a monthly price starting at 2.1 million yen, with a five-year revenue target of 20 billion yen from fiscal 2026 through fiscal 2030.

1. 1NEC及其合作伙伴推出基于CyIOC的NEC Cyber Secure Packagejp.ibtimes.com