Mitomo Co., LTD.

Mitomo Co., LTD., a Japanese for-profit organization headquartered in Yokohama, operates as a prime contractor delivering facilities engineering, infrastructure repair, electrical systems maintenance, HVAC equipment installation and replacement, and construction services to U.S. military installations throughout Japan. The company competes exclusively in open, full-and-open solicitations with no set-aside posture and has been registered in the System for Award Management since 2006.

Mitomo's customer concentration is heavily weighted toward the Department of the Navy. The Navy Installations Command leads by both award count and dollar value, accounting for 366 awards (52% of the total footprint) with $562 million in combined potential value across recent years. The United States Marine Corps ranks second by potential value ($252.7 million across 16 awards), followed by the Naval Facilities Engineering Command (77 awards, $121.3 million) and Naval Sea Systems Command (137 awards, $28.5 million). These four customers represent 98% of Mitomo's combined potential value. Place of performance spans U.S. military installations across Japan, including Commander Fleet Activities Okinawa, Naval Air Facility Atsugi, Commander Fleet Activities Yokosuka, Camp Zama, Kadena Air Base, and regional facilities in the Kanto Plain, with administrative oversight from Navy Installations Command.

Mitomo's recent capability work reflects a portfolio rooted in facilities maintenance and electrical infrastructure. Representative contracts include a $19.1 million definitive contract for SCADA modernization at facility YSK-1805 (awarded June 2025, Navy Installations Command), a $34.3 million single-award base operating support contract for Commander Fleet Activities Okinawa through 2029 (awarded September 2024, Navy Installations Command), a $250 million multiple-award design-bid-build MACC for Marine Corps Base Camp Butler and Commander Fleet Activities Okinawa through June 2029 (awarded June 2024, Marine Corps), an $81 million single-award indefinite delivery contract for preventive maintenance and service orders on electrical systems at Kanto Plain installations through September 2028 (awarded August 2023, Navy Installations Command), and a $7.84 million definitive contract for base-period non-recurring infrastructure work (awarded March 2025, Navy Installations Command). Smaller recent task orders span HVAC system replacement ($182,975, December 2025), electrical disconnect mechanism replacement ($286,091, December 2025), and emergency facilities repairs ($250,000–$514,486 recurring orders issued throughout 2025).

Mitomo holds multiple large single-award and multiple-award indefinite delivery vehicles anchoring most of its work. The Navy Installations Command's $81 million electrical systems IDIQ (N4008423-D-0405, through September 2028) and the $34.3 million Base Operating Support Contract for Commander Fleet Activities Okinawa (N4008424D0052, through September 2029) represent the largest active vehicles. The Design-Bid-Build Mini-MACC for Kanto Plains (26 task orders, $11.5 million combined potential value) supports smaller construction and facilities projects. Historical vehicle positions on NAVFAC Kanto Plains construction vehicles (2010–2015 and 2014–2019) account for 101 combined task orders and $15 million in potential value, reflecting long-standing relationships with Naval Facilities Engineering Command. Mitomo also holds a new $99 million multiple-award design-bid-build MACC for Naval Air Facility Atsugi through September 2033 (awarded September 2025) and a $5 million single-award blanket purchase agreement for equipment purchase and lease/rental services (Naval Sea Systems Command, through January 2031).

Activity has grown modestly year over year—28 awards in 2022 to 41 in 2025—with 24 awards (combined potential value $31.9 million) reaching ultimate completion within the next twenty-four months and therefore exposed to recompete. Mitomo operates as a 100% prime contractor; no subcontract footprint is present in the source data. The contractor's NAICS concentration reflects facilities work: Commercial and Institutional Building Construction (132 awards), Machinery and Equipment Repair and Maintenance (97 awards), Facilities Support Services (87 awards), and Other General Government Support (62 awards). PSC codes emphasize housekeeping and facilities operations support (77 awards) and maintenance of office and administrative buildings (74 combined awards). Combined potential value across all 710 awards stands at $988.9 million, with $179.5 million obligated to date (18% coverage). Mitomo's federal footprint is geographically concentrated in Japan and regionally focused on Navy and Marine Corps installations, with no meaningful presence in civilian agencies or defense work outside the Asia-Pacific region.