Public · Tokyo: 8031Updated Aug 31, 2026

Mitsui & Co.

Diversified trading, investment, and strategic-services company

Company website

Japanese global trading and investment company that used Spaceflight as part of its space-services strategy.

Principal supply-chain role03 · Networks & Operations

Communications networks, ground systems, mission operations, tracking, and space-domain awareness.

Principal supply-chain role03 · Networks & Operations

Japanese global trading and investment company that used Spaceflight as part of its space-services strategy.

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Mitsui & Co. · Tokyo: 8031

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TradingView · checked 2026-08-01

Suppliers, customers & partners

Suppliers & service providers to Mitsui & Co.

None currently known.

Mitsui & Co. customers & supported companies

Spaceflight Industries— strategic investorTell me more

Mitsui participated as an investor/co-owner in transactions related to Spaceflight (notably referenced in investor lists around the Spaceflight/BlackSky/LeoStella financing and acquisition events), supplying investment capital and strategic support to Spaceflight Industries' rideshare and space services activities.

Relationship research record

Mitsui & Co. program partners

Tri-Sat Constellation Co., Ltd.— program partner2 connectionsTell me more

Mitsui & Co., Ltd. (via Mitsui Bussan Aerospace Co., Ltd. and the Tri-Sat JV with Mitsubishi Electric and SKY Perfect JSAT) coordinates development and operation of a satellite constellation for high-frequency imagery, awarded December 2025 for the Japan Ministry of Defense project running to 2031; also partners with Synspective Inc., Institute for Q-shu Pioneers of Space Inc., and Axelspace Corporation on the same program.

Relationship research record

Mitsui & Co., through Mitsui Bussan Aerospace Co., Ltd., is a founding partner in Tri-Sat Constellation Co., Ltd., participating in the Satellite Constellation Project and contributing to program management and contracted work shares.

Relationship research record

Yamasa— program partner · strategic partner2 connectionsTell me more

Mitsui & Co. partnered with Yamasa Co., Ltd. as a 50/50 joint-venture partner in the acquisition of Spaceflight's rideshare/launch business, forming a strategic partnership that enabled Yamasa's entry into commercial rideshare and launch services (announced Feb 2020; acquisition completed mid‑2020).

Relationship research record

Mitsui & Co. partnered with Yamasa Co., Ltd. as a 50/50 joint venture partner in the 2020 acquisition of Spaceflight Inc., enabling Yamasa's entry and operations in the commercial space rideshare sector.

Relationship research record

JAXA— program partner / supplier (study contract) · program partner / mission user / customer2 connectionsTell me more

JAXA selected Mitsui (as prime commercial partner) in 2023 to conduct a concept study for development of the successor to Japan's Kibo science module (a module designed to dock with US commercial space stations); this selection positions JAXA as a direct program partner and customer of Mitsui's concept-study capability.

Relationship research record

Mitsui & Co. was selected by JAXA in 2023 to conduct a concept study for the development of the successor to Japan's Kibo science module (a module intended to dock with US commercial space stations), making Mitsui a contracted concept-study partner and supplier of commercial development services to JAXA.

Relationship research record

Mitsubishi Heavy Industries, Ltd.— program partner / industry collaboratorTell me more

Mitsubishi Heavy Industries is cited in industry releases alongside Mitsui and Mitsubishi Electric in Japan's commercial-space ecosystem development (noting collaborative roles on Japanese module and HTV/HTV‑X activities); Mitsubishi Heavy Industries is an industry collaborator that enables Mitsui's participation in Japanese human-space and station-related programs.

Relationship research record

Mitsubishi Electric Corporation— industry collaborator / technology partnerTell me more

Mitsubishi Electric is described as a technology and investment partner in documents that reference Mitsui's role in JAXA concept studies and Japan's commercial-space developments, indicating Mitsubishi Electric as a supplier/collaborator of spacecraft subsystem expertise that enables Mitsui's space program participation.

Relationship research record

Internalized capabilities

Spaceflight— acquired capability · acquired capability / supplier2 connectionsTell me more

Mitsui & Co., Ltd. (in partnership with Yamasa Co., Ltd.) acquired Spaceflight, Inc., the rideshare launch services provider, in 2020; this acquisition provides Mitsui with rideshare launch, deployment, and satellite services capabilities.

Relationship research record

Spaceflight's satellite rideshare-launch business was acquired by Mitsui & Co. (with Yamasa). This acquisition gave Mitsui an operated rideshare/launch capability that supplies launch integration, mission management and manifested rideshare slots to Mitsui's space business.

Relationship research record

Yamasa— co acquirer / partnerTell me more

Yamasa participated with Mitsui & Co. in the purchase of Spaceflight's rideshare-launch business; Yamasa is therefore a direct transaction partner that enabled Mitsui to enter the rideshare launch market.

Relationship research record

Mitsui Bussan Aerospace Co., Ltd.— subsidiary / enabling capability · subsidiary / operational partner2 connectionsTell me more

Mitsui Bussan Aerospace is Mitsui & Co.'s aerospace arm that provides satellite development, nano-satellite deployment from the ISS Kibo module, and operational support — i.e., an internal supplier/enabler of satellite deployment and mission services to Mitsui's wider space business.

Relationship research record

Mitsui & Co. operates its space business through Mitsui Bussan Aerospace, which provides satellite launch opportunities, deployment services, and one-stop development/operational support to satellite operators and customers.

Relationship research record

Explore Mitsui & Co. in context

← Suppliers to Mitsui & Co.4 companies · Browse profiles

Atlas Space Operations Mitsubishi Electric Corporation Mitsubishi Heavy Industries, Ltd.Spaceflight

Companies supplied by Mitsui & Co. →2 companies · Browse profiles

Spaceflight Industries Tri-Sat Constellation Co., Ltd.

↔ Both directions3 companies · Browse profiles

JAXA Mitsui Bussan Aerospace Co., Ltd.Yamasa

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