About us
Company Profile
- Corporate name
- OREX SAI, INC.
- Headquarter
-
59-16 Nisshin-cho, Kawasaki-ku,
Kawasaki-City, Kanagawa, Japan 210-0024
- Business
-
- ・Sales of Open RAN equipment and services
- ・Open RAN Construction, maintenance, and operation
- ・Planning of SMO, vRAN, and other initiatives
- Establishment
- April 1, 2024
- Shareholders
- NTT DOCOMO GLOBAL 66％、NEC 34％
- Group
-
About Company
NTT DOCOMO established the O-RAN ALLIANCE with leading global telecommunication operators in February 2018 and launched the world's first nationwide Open RAN 5G service in Japan in March 2020. Since introducing the OREX® brand in February 2023, NTT DOCOMO has been supporting Open RAN verifications for global telecom operators to help realize more open mobile networks around the world.
NEC, having delivered Open RAN solutions to telecom operators in Japan and other countries, was selected by NTT DOCOMO as a vendor for virtualized radio access networks (vRANs), one of NTT DOCOMO's 5G commercial services in Japan. With extensive experience in building communication infrastructure around the world, NEC offers strong system integration (SI) capabilities.
Both companies have been working towards realizing Open RAN together with OREX PARTNERS. As they enter a phase of full-fledged overseas expansion, establishing a system for providing products and services locally has become a challenge. By leveraging NTT DOCOMO's expertise in Open RAN and NEC's overseas footprint and global SI capabilities, they have decided to establish OREX SAI specializing in Open RAN business, enabling them to quickly develop overseas business infrastructure.
About Service
OREX SAI will procure all necessary Open RAN network equipment and software from OREX Partners, and then conduct system verification for the planning and construction of optimal mobile networks tailored to each telecom operator. Full-stack service will include planning, construction, maintenance, and operation under the Orex Packages framework.
Access
- By Train
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From Kawasaki station
- East exit -（6-minute walk） From Keikyu-Kawasaki station
- Central exit -（10-minute walk） From Hatchonawate station
- Exit 1 -（10-minute walk）
59-16 Nisshin-cho, Kawasaki-ku,
Kawasaki-City, Kanagawa, Japan 210-0024
Message
President and CEO Hiroshi Kobayashi
Vision
Creating a world without communication disparities
Leadership
Hiroshi Kobayashi / Representative Director and CEO
Hiroshi Kobayashi joined Nippon Telegraph and Telephone Corporation in 1989 and has contributed to the development of mobile communications technology for many years. He was responsible for the development of base stations from the first generation to the third generation, and then engaged in network construction and operation as well as formulation of the overall strategy. In June 2024, he retired from Managing Executive Officer and General Manager of the Network Division of NTT DOCOMO, and in April of the same year, he assumed the position of Representative Director and CEO of the Company.
Kenichi Takai / Representative Director and COO
Kenichi Takai is responsible for the Sales and Network Services divisions. He joined NEC Corporation in 1992 and had been involved in the development of mobile communication systems and business transformation through global partnerships. Since 2021, he had served as the head of the RAN business for domestic mobile network operators in Japan, contributing to the commercial deployment of virtualized RAN and network modernization. He joined OREX SAI as a Senior Adviser in October 2025 and was appointed Representative Director and COO in April 2026.
Yoshitaka Hiramoto / Director and CSO
Yoshitaka Hiramoto is in charge of planning and implementing management strategies. In 1994, he joined NTT Mobile Network Corporation, where he spent 17 years in the Research and Development Division developing base stations ranging from 2G to 4G. He then promoted domestic adoption of 4G and 5G in the Network Division. In 2022, he assumed the position of Global Business Director at NTT DOCOMO and launched the Open RAN service brand, OREX, to promote business development in global markets. In April 2024, he became Director and CSO of the Company.
Sadayuki Abeta / CTO
Sadayuki Abeta is in charge of Open RAN service development and technical sales. In 1997, he joined NTT DOCOMO, where he launched research on 4G and worked on standardization and base station development of 4G. At 3GPP, he served as an LTE rapporteur and vice chair of TSG RAN WG1, and contributed to the commercial deployment of 5G as a development manager. He also contributed to the establishment of O-RAN ALLIANCE. In 2020, he established the 5G Open RAN Ecosystem Project and has since led the global expansion of Open RAN. In April 2024, he became CTO of the Company.
Kaisuke Oshima / CFO
Kaisuke Oshima is in charge of the Finance and Corporate Divisions. He joined NTT DOCOMO in 1995 and worked in consolidated and non-consolidated accounting operations in the Finance Department. Later, he was responsible for business planning at branch offices and group companies and contributed to the planning and implementation of financial strategies. Leveraging his extensive financial experience, he is committed to building a solid financial foundation that supports corporate growth. In April 2024, he became CFO of the Company.
Hideki Nishijima
Board DirectorRyujiro Nemoto
Board DirectorMichio Kiuchi
Board DirectorHiroki Nishimura
Board DirectorKazuhito Amemiya
Audit & Supervisory Board MemberTetsuya Takada
Audit & Supervisory Board Member
Contact
For inquiries or consultations,
please feel free to contact us.