Oshima Shokai Co., LTD.

Oshima Shokai Co., LTD., a foreign-owned, for-profit company based in Iwakuni, Yamaguchi, Japan, provides facility maintenance, construction, and equipment support services to the U.S. Marine Corps as a prime contractor on full-and-open (non-set-aside) multiple-award and single-award indefinite delivery contracts at Marine Corps Air Station Iwakuni and other installations across Japan.

The company's capability portfolio centers on specialized facility infrastructure work: boiler water treatment chemicals, steam pipe replacement and repair, sewage pump upgrades, electrical systems work (power cables, electrical heaters), ground support equipment wash facilities, and ancillary base services including portable sanitation rentals, dumpster services, and equipment rental. Representative work includes a $680.9 million delivery order (awarded January 2023) to replace underground steam double pipe and pump infrastructure near Building 2255 at MCAS Iwakuni under the Marine Corps Air Station Mini MACC Design, Bid, Build Japan vehicle; a $664.5 thousand delivery order (September 2023) to provide power for electrical heaters at all gates at MCAS Iwakuni; and a $385.5 thousand delivery order (January 2026) to replace underground steam double pipe between connection points SP2-C-5 and SP2-C-6 at MCAS Iwakuni. Oshima Shokai also supplies recurring boiler water treatment chemicals through a single-award indefinite delivery contract ($351.2 thousand ceiling, September 2024–September 2029) against which it has issued numerous task orders ranging from $4 thousand to $68 thousand per order.

Customer concentration is extreme and monolithic. The Marine Corps accounts for 248 of 257 total awards (99% of award count) and $308.8 million of the $309.2 million combined potential value across the vendor's full footprint. The Department of the Army, Department of the Navy Installations Command, Department of the Navy, and Department of the Air Force together represent fewer than ten awards and negligible dollar value. The vendor's entire federal footprint is geographically and operationally tied to MCAS Iwakuni.

Oshima Shokai holds two principal indefinite delivery contracts with the Marine Corps: a $250 million multiple-award Mini MACC vehicle (August 2024–August 2029) for small-magnitude design-bid-build construction and repair projects at MCAS Iwakuni, and the $351.2 thousand single-award boiler water treatment chemicals contract noted above. Within the Mini MACC vehicle, the vendor has received nine task orders carrying $3.4 million in combined potential value. Older IDCs (M6261310D0001, M6261305D0002, N4008405G5625, and M6740014D0017) collectively represent 63 historical task orders with modest individual values, reflecting the company's long-standing role as a recurring supplier to MCAS Iwakuni operations and maintenance.

Activity has been steady but declining. The vendor placed seven awards in 2022, eight in 2023, seven in 2024, and five in 2025; only two awards appear in 2026 year-to-date. The recompete cliff is minimal—only two awards (combined potential value $419 thousand) reach ultimate completion within the next twenty-four months, reflecting the long tail-out dates on the large new Mini MACC contract (August 2029) and boiler chemicals contract (September 2029).

As of the source data, Oshima Shokai operates as a 100% prime contractor (256 of 257 awards are prime); a single subcontract award under PAE Government Services (September 2024) for residential electric lighting fixture manufacturing under the MCAS Iwakuni Base Operation and Support contract is negligible in scope and represents an outlier from the company's established prime-only posture. The vendor competes full-and-open, with no set-aside designations across its entire award footprint; its Japanese ownership and location at the U.S. military installation create natural operational advantages for recurring facility-support work in-country but restrict pursuit to work performable at or in support of MCAS Iwakuni and other U.S. installations in Japan.