Okinawa Marine Service Co.,Ltd.

Okinawa Marine Service Co., Ltd., a Japan-based minority-owned subsidiary of Ryuseki Corporation, operates as a prime contractor providing tugboat operations, pilotage, water taxi, barge support, and crane services to the U.S. Navy and Marine Corps at military installations throughout Okinawa. The company competes exclusively under full and open competition with no set-aside designations across its entire federal footprint—a posture consistent with established competitive standing in maritime logistics procurement for overseas military operations.

Okinawa Marine Service holds an extraordinarily concentrated customer base anchored almost entirely in the Navy. The Department of the Navy Installations Command accounts for 1,100 awards worth $36.8 million combined potential value (86% of total awards, 87% of potential value). Three other Navy components—Military Sealift Command, the Secretary of the Navy Office of Naval Research, and U.S. Pacific Fleet Forces—add 200 awards worth $3.3 million combined. The Marine Corps represents 37 awards valued at $1.1 million. This concentration reflects the vendor's geographic specialization at Okinawa's White Beach, Tengan Pier, and other forward-deployed naval facilities. Nearly all work is task-order activity issued under multiple indefinite delivery contracts rather than standalone purchase orders, giving the Navy operational flexibility to call on Okinawa Marine's services as vessel movements and operational schedules require.

The vendor sits on five primary IDV vehicles. The largest, Indefinite Delivery Contract N6264914D0018, has generated 477 task orders worth $3.7 million combined potential value. Contract N6264919D0014 has funded 296 task orders valued at $4.6 million. The March 2024 single-award IDV N6824624D0003 carries a $4.7 million ceiling through March 31, 2029, and consolidates tugboat and pilotage services at White Beach and other Okinawan ports; it has anchored most of the vendor's recent activity, with individual delivery orders ranging from $3,000 to $520,000. A December 2025 award added a dedicated pilotage services IDV (N6824623D0002 successor, $764 thousand ceiling through June 30, 2027) for Kin-Nakagusuku Bay and Naha Port. These vehicles are the sole delivery mechanisms for Okinawa Marine's federal work; there is no GSA Schedule, GWAC, or other government-wide vehicle presence.

Okinawa Marine Service's recent activity trajectory has contracted sharply. Annual awards declined from 124 in 2024 to 28 in 2025 and only 6 through mid-2026, a drop driven by the consolidation of historically separate task-order streams into larger single-award IDVs with fewer but higher-value delivery orders. Combined obligated dollars—$27.5 million against $42.4 million potential value across the full source dataset—indicate roughly 65% burn-through. Recompete exposure in the next twenty-four months is minimal: only one award (valued at $264 thousand) approaches expiration, reflecting the recent March 2024 and December 2025 IDV awards extending through 2027 and 2029 respectively.

The vendor is a subsidiary of Ryuseki Corporation, a Japan-based energy and logistics firm that holds substantial Defense Logistics Agency Energy and Air Force fuel distribution contracts in Japan. Okinawa Marine Service provides no subcontracting work to federal contractors; all federal awards are prime work performed by company personnel at Okinawa military facilities. The vendor delivers services in a single geographic footprint—Okinawa, Japan—and does not bid on contracts for other regions or contract vehicles. Work is entirely tactical and operational: short-duration pilotage guidance, tugboat towing, barge transportation, and equipment rental supporting routine vessel movements and episodic military exercises. No strategic or advanced capability development, system integration, or engineering services appear in the award record. The company's federal footprint is narrowly defined by geography, customer, service type, and vehicle structure, with virtually no diversification into other maritime segments, defense regions, or federal customer agencies.