Ohna Denken Co.,Ltd.

Ohna Denken Co., Ltd., a Japan-based for-profit corporation headquartered in Okinawa, operates as a prime contractor delivering small-magnitude design-bid-build construction and facility modification services to U.S. military installations in Japan, competing full-and-open with no socioeconomic set-aside posture.

The vendor's federal footprint centers entirely on the Marine Corps and Navy, with 12 Marine Corps awards accounting for $261.1 million in combined potential value—roughly 99.6% of the vendor's $262 million total across all awards. The Marine Corps awarded Ohna Denken a $250 million multiple-award indefinite-delivery contract on June 28, 2024, for small-magnitude design-bid-build construction at Marine Corps Base Camp Butler and Commander Fleet Activities Okinawa, Japan, running through June 27, 2029. Against this MACC, the Marine Corps and Navy Installations Command have since issued seven delivery orders totaling approximately $5.9 million in combined potential value. Representative work includes a $3.16 million order (September 12, 2025) for dehumidification system installation at Henoko ammunition storage area, a $1.17 million order (March 6, 2025) for interior refurbishment at four buildings at Camp Hansen, a $480,333 order (May 19, 2025) for facility modifications at Camp Schwab including door and hydraulic lift replacement, and a $350,000 Navy Installations Command order (March 5, 2025) for vehicle wash ramp modification and undercarriage spray installation at White Beach. Secondary customers include the Department of the Air Force Defense Finance and Accounting Service (3 awards, $363 thousand) and the Department of the Navy Installations Command (1 award, $350 thousand).

Ohna Denken's capability portfolio spans commercial and institutional building construction (10 awards), structural and building exterior work (3 awards), and industrial building construction (2 awards), with work scopes covering facility refurbishment, door and systems replacement, and specialized infrastructure installation at U.S. military bases in Okinawa. Activity across recent years remains modest and episodic—two awards in 2024, four in 2025, and two in 2026 to date—with four awards (combined potential value $4.4 million) reaching ultimate completion within the next twenty-four months. The vendor operates exclusively as a prime contractor with no subcontract footprint in the source data. Combined dollars obligated across all awards total $13.4 million, or 5% of combined potential value, indicating substantial remaining work pipeline against awarded contracts.