株式会社closip

株式会社closip (closip Inc.) is a Tokyo-based communications and security technology company that develops and provides network connectivity services built on its proprietary "LTE over IP" (LTE virtualization) technology, which implements private-LTE-style communication over IP networks such as the internet and wireless LAN using LTE protocols. Its core product, the software SIM "closip SIM," bundles traffic encryption, device authentication and device management so that any internet-connected device can be onboarded using device-specific information, with authentication, closed-network segmentation and control managed centrally in the cloud. The company positions this as a platform for raising the security level and extending the functionality of network devices generally, and states a mission of providing a safe environment in which every person and every device can connect simply and securely from anywhere, under the vision "Create the Secure World."

The product portfolio described in company profiles includes closip SIM; "Resalio Connect," a remote-work/remote-access service combining LTE over IP with Ascentech's Resalio Lynx product; "Tegata," a network service using LTE over IP; "A3C-SIM Connect," providing hybrid on-premises/cloud network environments; "Wrap," a cloud network service offered jointly with UniAdex that connects devices to corporate networks through a software install; "ソコワク (Sokowaku)," an ID- and password-free VPN co-developed with VAIO; and "SOLTECT," a passwordless-authentication and always-on VPN remote access service offered with Kaga Solnet. Databases categorize the company under IT/communications, telecommunications, security, B2B and B2C, with tags including SaaS, IoT, cybersecurity, cloud services, R&D-driven and wireless communications.

The company was founded in September 2016 by Takehiro Ikeda, who serves as representative director and CEO. It previously operated under the name LTE-X before adopting the closip name. Reported executives include CTO Yoshihisa (可久) Ito, CFO Sho Furuya (head of the corporate planning office), and outside director Hiroshi Ezoe. Headcount is small — a Wantedly profile lists 7 members and one database lists roughly 10 or fewer employees.

Founding story

closip was founded in September 2016 (incorporated 2016-09-20) by Takehiro Ikeda, who is also representative director and CEO. According to the company's recruiting profile, Ikeda completed a doctoral program at Osaka University, joined NTT DOCOMO, spent time as a visiting researcher at Stanford University in the United States, and founded Wireless Gate (listed on the Tokyo Stock Exchange First Section) before his current role. One database records the company's origin type as a joint venture.

Business model

closip supplies its LTE over IP platform and closip SIM software SIM to businesses, largely through co-developed and co-branded services with established Japanese IT vendors, system integrators and hardware makers (UniAdex, VAIO, Kaga Solnet, Ascentech, CHIeru). Databases tag the company as B2B (and partly B2C) with a subscription/SaaS model in software, cloud services and security.

Profiles characterize the business as subscription-based software, SaaS and cloud services, including rental-type service tags, delivered around the closip SIM and LTE over IP platform.

Traction

Reported traction consists mainly of capital-and-business alliances and co-developed products with Japanese corporates: Kyowa Exeo, TDC Soft, UniAdex (the "Wrap" cloud network service), CHIeru, VAIO (the "ソコワク" VPN), Kaga Solnet ("SOLTECT"), and Ascentech ("Resalio Connect"). A partner announced in January 2025 the joint development and sale of a NAS server embedding LTE over IP. One database indicated a Series B stage as of March 2024 with an estimated post-money valuation of ¥1,332 million (stated as an estimate).

Latest developments

In January 2025 a partner announced a business tie-up with closip based on its patented LTE over IP technology, with a first deliverable being the joint development and sale of a NAS server incorporating the technology. Company database entries were updated through 2026 and continue to list active co-developed services with UniAdex, VAIO and Kaga Solnet. Earlier, in September 2022, Tokyo-listed Ascentech (code 3565) disclosed a ¥50 million investment in closip to deepen cooperation on virtual desktop and remote access products.