Tominaga & Co, LTD.

Tominaga & Co, LTD., a for-profit corporation headquartered in Osaka, Japan, supplies diesel engine components, marine genset parts, and maintenance and repair services to the U.S. Navy as a prime contractor on small-dollar purchase orders, with all work performed in Japan and no use of set-asides across its federal footprint.

Tominaga & Co, LTD. operates as a 100% prime contractor—no subcontract work appears in its recent federal history. The vendor competes full-and-open; none of its awards carry set-aside designations, though at least one underlying solicitation (January 2026) was posted as Women-Owned Small Business set-aside before the award went to Tominaga on a full-and-open basis. The company is structured as a child entity under a parent Tominaga & Co., LTD. operating an Engine Sales Department division, both foreign-owned organizations.

Navy Installations Command dominates Tominaga's customer base, accounting for 16 awards and $1.1 million in combined potential value—100% of the portfolio's named potential-value dollars. The remaining four Navy organizational customers (United States Pacific Fleet Forces with 8 awards, Navy proper with 6 awards, Naval Sea Systems Command with 3 awards, and Naval Facilities Engineering Command with 2 awards totaling $47 thousand) round out a nearly complete concentration within a single customer agency. Recent named work includes a $216.6 thousand 24-month boat engine maintenance contract through September 2028 at Commander Fleet Activities Yokosuka, a $112.2 thousand diesel generator engine repair service order (completed November 2024), a $34.3 thousand diesel generator engine repair service purchase order (completed January 2025), a $34.1 thousand John Deere marine genset engine fuel injectors replacement order (February 2026), and a $29.2 thousand John Deere marine genset engine parts and oil pump order (January 2026). All performance occurs in Japan with inspection and acceptance coordinated through U.S. Naval facilities including Naval Base Yokosuka Port Operations.

Activity is sporadic and low-volume. The source spans awards from 1997 to 2026, yet the past five years show only eight awards (2021: 1, 2023: 2, 2024: 2, 2025: 1, 2026: 2). Combined potential value across all 35 awards totals $1.1 million, though obligated dollars ($1.6 million) exceed potential value by 43%, indicating actual spend has outpaced initial ceiling valuations. Category concentration runs to diesel engines and components (7 awards under PSC Diesel Engines And Components, 7 under maintenance/repair PSC codes), motor and generator manufacturing (4 awards), and genset equipment (4 awards). No parent contract vehicles, GWACs, IDIQs, or BPAs appear in the portfolio—all work is direct purchase-order procurement by Navy Installations Command.