Sumiju Yokosuka Kogyo Co., LTD.

Sumiju Yokosuka Kogyo Co., LTD., a Japanese subsidiary of Sumitomo Heavy Industries, LTD., operates as a foreign-owned prime contractor delivering construction, facility maintenance, repair, and equipment rental services to Department of Defense agencies across Japan and the Pacific region, competing on a full-and-open basis without SBA certifications. Headquartered in Yokosuka, Kanagawa, Japan, Sumiju Yokosuka Kogyo holds primary NAICS categories in specialty trade contracting, shipbuilding and repair, and commercial/institutional building construction, with work performed across domestic and subordinate military installations in Japan, Okinawa, and forward-deployed Pacific locations.

The vendor's capability portfolio spans design-build and design-bid-build construction, facility system upgrades, equipment maintenance and repair, temporary equipment rental (particularly HVAC, dehumidification, and power generation), and specialized infrastructure projects supporting naval and military operations. Representative prime work includes a $15.8 million design-bid-build repair of barracks building 472 at Camp Foster, Okinawa, issued by the Marine Corps in May 2024; a $9.4 million caisson dry dock overhaul at Commander Fleet Activities Yokosuka for the Navy, completed in early 2025; a $13.1 million HVAC system overhaul of a Morale, Welfare, and Recreation facility awarded by Navy Installations Command in October 2022; and routine equipment rental task orders totaling tens of thousands of dollars through Naval Sea Systems Command blanket purchase agreements for temporary air conditioning, generators, dehumidifiers, and compressors supporting naval ship repair operations at Yokosuka and Sasebo.

Customer concentration sits heavily with Navy components. The top five funding agencies account for 80% of awards by count, with Department of Navy Naval Sea Systems Command leading at 208 awards ($23.8 million combined potential value), Navy Installations Command at 89 awards ($113.4 million), and Naval Facilities Engineering Command at 41 awards ($595.2 million). By potential value, the ranking shifts significantly: Pacific Air Forces anchors 99% coverage with $5 billion combined potential across 38 awards — predominantly the $995 million Okinawa Multiple Award Construction Contract awarded in September 2025 — followed by the Marine Corps ($767.8 million across 41 awards) and Naval Facilities Engineering Command ($595.2 million across 41 awards). The vendor serves 22 distinct customer agencies.

Sumiju Yokosuka Kogyo holds four significant parent IDIQ vehicles. The Kadena Multiple Award Construction Contract, a $995 million Pacific Air Forces IDIQ awarded September 2025 through September 2028, has driven 60 task orders worth $115.3 million to date for design-build and design-bid-build services at Okinawa installations including Kadena Air Base, Camp Foster, MCAS Futenma, and Naha Port. The Kanto Japan Plains Operation MACC, a $250 million Navy Installations Command vehicle awarded June 2023 through June 2028, supports construction and facility work across Commander Fleet Activities Yokosuka, Sasebo, and subordinate installations with six delivery orders executed totaling approximately $24.2 million. A $245 million multiple-award MATOC for Sustainment, Restoration, and Modernization work in Okinawa was awarded by ENDIST Japan in May 2026 through May 2031, with a representative $2.9 million delivery order issued May 2026. Naval Sea Systems Command maintains a single-award $5 million equipment rental and lease BPA awarded January 2026 through January 2031, underpinning routine task orders for temporary HVAC and power equipment at naval facilities.

Activity has declined year over year — 29 awards in 2022 to 10 in 2026 (through July) — reflecting the shift toward larger, multi-year IDIQ vehicles rather than individual task orders. Seventeen awards totaling $47 million combined potential value reach ultimate completion within the next twenty-four months, creating recompete exposure, particularly for the Kadena MACC task orders and smaller BPA calls against Naval Sea Systems Command equipment rental agreements. The vendor does not hold subcontractor positions in the source data; all activity is prime.

Sumiju Yokosuka Kogyo competes under no set-aside categories and operates exclusively on full-and-open competition. As a foreign-owned entity, it is ineligible for SBA certifications. The parent, Sumitomo Heavy Industries, LTD., is a major Japanese industrial conglomerate supplying ship repair, maintenance, and construction services to the U.S. Navy and broader defense industrial base, and Sumiju Yokosuka Kogyo serves as the subsidiary managing forward-deployed operations and facility support across Japan and the Pacific.