10X Co., Ltd. (head office: Minato-ku, Tokyo; Representative Director: Ryohei Tanaka; hereafter, “the Company”) has decided to acquire 100% of the issued shares of Three Side Co., Ltd. (head office: Itabashi-ku, Tokyo; Representative Director: Keisuke Aiki; hereafter, “Three Side”), making it a wholly owned subsidiary effective October 1, 2026.
With physical security remaining its core business, the Group will strengthen its technical and installation capabilities in IT infrastructure and further expand its ability to provide end-to-end design, system implementation, installation, and maintenance.
1. Purpose of the Acquisition
Further strengthening physical security.
Establishing IT infrastructure as a second foundation for growth.
The Company began in IT infrastructure and built on that technical and installation experience to expand into physical security, now its core business.
AI adoption and data center investment are increasing demand for integrated services. Larger, more complex projects and shorter schedules require greater expertise and flexible installation teams.
The acquisition will strengthen physical security and develop IT infrastructure as a second source of growth. Three Side's installation expertise and field experience will expand the Group's capabilities. Together, the companies will provide integrated design, system implementation, installation, and maintenance.
2. Structure Following the Acquisition
Three Side will remain a separate legal entity within the 10X Group, focused on IT infrastructure. Keisuke Aiki is expected to remain Representative Director.
10X will focus on physical security; Three Side will handle IT infrastructure design, implementation, and installation. Together, they will strengthen technical expertise, installation, and project management to support large, complex projects.
3. Comments from the Representatives
10X Co., Ltd.
Ryohei Tanaka, Representative Director
“This acquisition is a strategic initiative to strengthen the capabilities we have developed, rather than to enter a new business.
I am confident that the addition of Three Side's technical expertise and extensive installation experience will enable us to provide greater value than ever to customers in both physical security and IT infrastructure.
We will continue to pursue sustainable growth as an engineering group supporting the infrastructure society depends on.”
Three Side Co., Ltd.
Keisuke Aiki, Representative Director
“The name Three Side comes from the traditional Japanese business philosophy of sanpo-yoshi.
I decided to join the Group because I strongly identify with 10X as a company that also places sanpo-yoshi at the heart of its management and combines that philosophy with speed and a spirit of challenge.
Continuing to value the philosophy of sanpo-yoshi, we will contribute to our customers, partners, and society as a company trusted for its technical expertise.”
4. Overview of the Company to Be Acquired
Company name: Three Side Co., Ltd.
Address: 2-24-12 Shingashi, Itabashi-ku, Tokyo
Representative Director: Keisuke Aiki
Business: IT infrastructure design, implementation, and installation
Established: August 2021
Planned shareholding: 100% of issued shares
Planned date of becoming a wholly owned subsidiary: October 1, 2026
Contact
Corporate Division, 10X Co., Ltd.
Yutaka Nakatani, Chief Financial Officer (CFO)
Tel: +81-3-4500-8601
Email: PR@tenx.jp