From left: Shumpei Tsuda, General Manager, Corporate Finance Department, Division 2, Development Bank of Japan, Yuichiro Moto, Managing Executive Officer, Group Head, Corporate Banking Group, MUFG Bank, Masahiko Arai, Executive Officer (Associate), Group President, Defense & Space Systems, Mitsubishi Electric, Minako Tsumenaga, Senior Vice President, Head of Alliance Division, Research and Development Marketing Headquarters, NTT, Kengo Nagase, Senior Executive Vice President, Representative Member of the Board, NTT DOCOMO BUSINESS

TOKYO, November 9, 2026 – Mitsubishi Electric Corporation (TOKYO: 6503) announced today that the company entered into a memorandum of understanding (MOU) on November 6 with NTT, Inc., NTT DOCOMO BUSINESS, Inc., MUFG Bank, Ltd., and Development Bank of Japan Inc. to explore comprehensive collaboration on the development and operation of a mega-constellation—an integrated system in which numerous satellites operate in coordination to provide services covering broad areas of the Earth—and on the provision of services utilizing the constellation. Under the MOU, the five companies will examine the technical and business feasibility of commercializing a diverse range of services enabled by mega-constellations, including communications, Earth observation, satellite-based positioning, navigation, and timing (PNT), and space data centers.¹

In recent years, space development initiatives by both the public and private sectors have accelerated worldwide, driven by technological advances such as the miniaturization and enhanced capabilities of satellites, as well as increased launch frequency. In particular, satellite constellations, in which multiple satellites operate in coordination, are increasingly being utilized as social infrastructure in a wide range of fields, including communications, Earth observation, positioning, disaster prevention and mitigation, and national security. Against this backdrop, further efforts are needed to expand the use of space.

In response to these market circumstances, the five companies will combine their respective technologies, customer bases, financial capabilities, and business development expertise to pursue the realization of a sustainable and highly reliable mega-constellation business based on openness and interoperability. Additionally, they will work together to identify the required technological foundations and challenges, while examining and coordinating a concrete framework for collaboration.

Under the MOU, Mitsubishi Electric will leverage its technologies and expertise in satellite and ground facility development and manufacture, as well as system integration cultivated over many years in its defense and space systems business. The company will conduct technical studies on the overall system design and integration of the mega-constellation. Based on user needs, the company will examine methods for integrating satellites, ground stations, communications networks, and operations systems. It will also work to develop a concrete system concept that combines the technologies and services of partner companies, enables efficient construction and operation, and supports future functional expansion.

Mitsubishi Electric will also explore the application to mega-constellations of the Digital Space Interface (DSI),² an open common interface for satellite information processing that the company is developing in collaboration with other space development companies. Through the use of DSI, the companies aim to facilitate the addition and updating of large software packages on satellites in orbit, thereby improving the efficiency of satellite development and enabling flexible responses to the addition and updating of services.

Through this collaboration, Mitsubishi Electric, NTT, NTT DOCOMO BUSINESS, MUFG Bank, and Development Bank of Japan will accelerate studies aimed at realizing new services utilizing mega-constellations for customers in Japan and overseas. These studies will cover the development of communications and Earth observation infrastructure—including means of communication during disasters and in areas with limited connectivity—as well as the provision of positioning information and more efficient utilization of satellite data through the development of space data centers.

Through these initiatives, the five companies aim to strengthen space infrastructure and contribute to addressing a wide range of social issues.