Onaka Gumi Co.,Ltd.
Onaka Gumi Co., Ltd. is a for-profit construction company based in Okinawa, Japan, that specializes in providing comprehensive services to U.S. federal government agencies, particularly those associated with military installations in the region. Registered in the System for Award Management (SAM.gov) since May 13, 2005, the company has established itself as a key contractor supporting U.S. military infrastructure and environmental management needs in Okinawa. While limited publicly available information exists about the company's broader corporate background, its extensive federal contract history demonstrates a sophisticated capability to support complex military facility maintenance and environmental remediation projects.
The company's federal contract awards predominantly involve construction, maintenance, repair, waste disposal, and environmental remediation services across U.S. military installations in Okinawa. These contracts consistently span waste management activities, including the disposal of industrial waste, flammable materials, chemical substances, compressed gas cylinders, and non-regulated solids. Onaka Gumi has received numerous delivery orders from agencies such as the Defense Logistics Agency Disposition Services, U.S. Army Corps of Engineers, U.S. Marine Corps, Navy Installations Command, and Pacific Air Forces. The contracts frequently involve precise, technical services like demolishing buildings, repairing infrastructure, managing hazardous materials, controlling soil erosion, and addressing typhoon-related damage. Significantly, none of the contracts reviewed utilized set-aside designations, indicating the company's ability to compete successfully in open competition.
Onaka Gumi holds three principal federal contract Indefinite Delivery/Indefinite Quantity (IDIQ) contracts that form the backbone of its federal contracting portfolio. The first is a $250 million multiple-award IDIQ with the U.S. Department of the Navy for design-bid-build construction services at Marine Corps Base Camp Butler and Commander Fleet Activities Okinawa, effective through June 27, 2029. The second is a $95 million multiple-award IDIQ with the U.S. Army Corps of Engineers for construction, maintenance, and repair services in Okinawa, running until April 20, 2028. The third is a $7.8 million single-award IDIQ with the Defense Logistics Agency Disposition Services for waste management and environmental remediation services, with a performance period ending May 19, 2029. These contracts enable Onaka Gumi to receive task orders for projects ranging from small infrastructure repairs to large-scale demolition and environmental remediation efforts, positioning the company as a critical service provider for U.S. military operations in the Okinawa region.
GW6ZE1QWBLH3 236220
Not listed 2-chōme-1-1 Ōhira, Urasoe, Okinawa 901-2113, Japan
5/13/05 9/6/25 American Engineering Corporation
American Engineering Corporation is a foreign-owned, for-profit construction company based in Okinawa, Japan, that provides comprehensive infrastructure, construction, and facilities maintenance services to the United States Department of Defense. Registered in the System for Award Management (SAM.gov) since 2002, the company specializes in delivering critical construction, repair, maintenance, and upgrade services across military installations in Japan and Okinawa. While specific details about the company's origins and internal structure are limited from the available contract documentation, the firm has established itself as a key contractor supporting U.S. military infrastructure needs in the Pacific region.
The company has been awarded numerous federal contracts across multiple agencies, including the Marine Corps, Navy, Air Force, Department of Defense Education Activity (DoDEA), and Naval Sea Systems Command. These contracts cover an extensive range of services such as facility repairs, infrastructure upgrades, HVAC system replacements, electrical work, roofing repairs, painting, construction of new facilities, maintenance of vertical transportation equipment, and specialized technical services. The contracts consistently demonstrate American Engineering Corporation's capacity to handle complex, multi-faceted projects across diverse military installations. Notably, none of the contract awards utilized small business set-aside designations, and the company has worked both as a prime contractor and subcontractor, collaborating with entities like Leidos, Inc., L3 Technologies, and L3Harris Technologies.
American Engineering Corporation holds several significant Indefinite Delivery/Indefinite Quantity (IDIQ) contract vehicles that enable flexible, mission-critical infrastructure support. These include a $32.4 million roofing and exterior painting IDIQ with the Marine Corps Air Station Iwakuni, a $250 million multiple-award contract for small-scale construction at MCAS Iwakuni, a $2.7 million contract for fire protection systems maintenance with the Bureau of Medicine and Surgery, and a $250 million multiple-award contract for design-bid-build requirements with Marine Corps Base Camp Butler. These contracts collectively demonstrate the company's ability to provide comprehensive, long-term infrastructure support across various military installations, with contract periods ranging from three to eight years and covering a wide spectrum of construction, maintenance, and specialized technical services.
M336EV5K3YZ3 561210
Not listed 7 Chome-11 Oyama, Ginowan, Okinawa 901-2223, Japan
1/15/02 12/27/25 Witco Industries LTD.
Witco Industries LTD. is a Japan-based construction and facilities maintenance company registered in the U.S. federal government's System for Award Management (SAM.gov) since December 2004. As a foreign-owned, for-profit organization, the company specializes in providing comprehensive construction, renovation, repair, and maintenance services primarily to U.S. military installations in Okinawa, Japan. The company is a subsidiary of Sanken Setsubi Kogyo Co., LTD., a larger Japanese construction firm, and has established itself as a trusted contractor for various branches of the U.S. military.
Through its federal contract awards, Witco Industries LTD. has performed a wide range of construction and maintenance services across multiple U.S. military bases in Okinawa. These services include replacing water supply piping, repairing and replacing fuel storage systems, installing hand wash stations, repairing swimming pool linings, replacing roof sheeting, upgrading electrical systems, constructing trash enclosures, and performing facility renovations. The company has worked extensively with agencies such as the U.S. Marine Corps, Navy Installations Command, Pacific Air Forces, Army Corps of Engineers, and the Department of Defense Education Activity. All of the company's recent contract awards have been made without specific small business set-aside designations, indicating open competition for these projects.
Witco Industries LTD. holds three significant indefinite-delivery/indefinite-quantity (IDIQ) contract vehicles that enable it to perform ongoing construction and maintenance work. These include a $250 million Marine Corps Base Camp Butler and Commander Fleet Activities Okinawa (CFAO) Design-Bid-Build Multiple Award Construction Contract, a $49.5 million Simplified Acquisition of Base Engineering Requirements (SABER) contract with the Pacific Air Forces at Kadena Air Base, and a $95 million Construction, Maintenance and Repair in Okinawa, Japan contract with the U.S. Army Corps of Engineers. These contracts allow Witco to bid on and receive task orders for various construction, renovation, repair, and maintenance projects across U.S. military installations, with contract values ranging from small maintenance tasks to multi-million dollar infrastructure upgrades.
E3VJEL49HJR7 236220
Not listed 2-chōme-11-7 Mashiki, Ginowan, Okinawa 901-2224, Japan
12/14/04 12/1/25 Oshiro Gumi Hexel Works JV
Oshiro Gumi Hexel Works JV is an international joint venture organization that provides construction services to the U.S. federal government, primarily for facility improvement and repair projects at military installations in Okinawa, Japan supporting the Department of Defense's Pacific operations. As a for-profit entity registered to receive federal awards, Oshiro Gumi Hexel Works JV has held prime indefinite-delivery/indefinite-quantity contracts like the Mini Multiple Award Construction Contract for Various Government Installations in Okinawa with the Naval Facilities Engineering Command.
Through firm fixed-price delivery orders issued by agencies like the U.S. Marine Corps and Department of the Air Force Pacific Air Forces under these master contracts, Oshiro Gumi Hexel Works JV has provided various construction services at bases across Okinawa. This has included replacing air conditioning systems, air handling units, electrical components, wooden flooring, chillers, locksets, conducting resurfacing work, and procuring equipment like reclosers. The work has spanned projects at locations like Camp Courtney, Camp Kinser, Camp Foster, Marine Corps Air Station Futenma, and Kadena Air Base. Many of the delivery orders fell under no set-aside designation. While most were awarded by the Marine Corps to support their installations, the Air Force has also contracted Oshiro Gumi Hexel Works JV for minor construction services through vehicles like the Kadena Air Base Mini Construction MACCs 2015-2021.
ESKHFVMDKU97 236220
Not listed Not listed 5/7/13 2/16/25 Motoi Doboku Co., LTD.
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R8DWBBAA3RU6 237310
Not listed Not listed 10/21/10 6/17/20