Nanseki Kaihatsu Co.,Ltd.
Nishihara, Okinawa
- UEI
- WZWWBR7HMSF7
- CAGE
- JS963
- SAM.gov registration
- Active through
Company facts
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Tax Exempt)
- Other NAICS codes in SAM.gov
-
- 236210 Industrial Building Construction
- 236220 Commercial and Institutional Building Construction
- 237110 Water and Sewer Line and Related Structures Construction
- 237130 Power and Communication Line and Related Structures Construction
- 237310 Highway, Street, and Bridge Construction
- 237990 Other Heavy and Civil Engineering Construction
- 238110 Poured Concrete Foundation and Structure Contractors
- 238130 Framing Contractors
Show all 23
- 238140 Masonry Contractors
- 238150 Glass and Glazing Contractors
- 238160 Roofing Contractors
- 238170 Siding Contractors
- 238190 Other Foundation, Structure, and Building Exterior Contractors
- 238210 Electrical Contractors and Other Wiring Installation Contractors
- 238220 Plumbing, Heating, and Air-Conditioning Contractors
- 238290 Other Building Equipment Contractors
- 238310 Drywall and Insulation Contractors
- 238320 Painting and Wall Covering Contractors
- 238330 Flooring Contractors
- 238340 Tile and Terrazzo Contractors
- 238350 Finish Carpentry Contractors
- 238390 Other Building Finishing Contractors
- 238910 Site Preparation Contractors
- SAM.gov registration date
- Physical address
- 1498 Onaha, Nishihara, Nakagami District, Okinawa 903-0103, Japan
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $0 |
| FY2026 | $19,144 |
Top agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Air Force | $19,144 |
Contract awards
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| Industrial water treatment kadena AB | Pacific Air Forces (USAF) | $19,144 | |
| Water tank cleaning | Pacific Air Forces (USAF) | $10,616 | |
| Water tank cleaning and disinfection MFH | Pacific Air Forces (USAF) | $206,239 | |
| Tank cleaning service for bldg.5602 | Marine Corps (Navy) | $9,158 | |
| Preventive maintenance for tank farms | Pacific Air Forces (USAF) | $225,120 |
Latest 5 listed here. See the rest on GovTribe.
Contract subawards
| Prime contractor | Prime award | Amount | Awarded |
|---|---|---|---|
| WSP USA Environment & Infrastructure Inc. | FA890324F0011 | $40,730 |
Similar vendors
| Vendor | Location | Primary NAICS |
|---|---|---|
| Nikken Sogyo Co., LTD. | Toshima City, Tokyo | 221320 Sewage Treatment Facilities |
| Kankyo Seibi Co.,Ltd. | Nakagusuku, Okinawa | 561720 Janitorial Services |
| Kotobuki Kankyoh Kizai Co.,Ltd. | Osaka, Osaka | 333998 All Other Miscellaneous General Purpose Machinery Manufacturing |
| Kitanihon Keiso K.K. | Hachinohe, Aomori | 238290 Other Building Equipment Contractors |
| Nichibei United Corporation | Okinawa, Okinawa | 562219 Other Nonhazardous Waste Treatment and Disposal |
About the company
Nanseki Kaihatsu Co.,Ltd., a for-profit organization headquartered in Okinawa, Japan, provides industrial water treatment, water storage tank cleaning, and facility maintenance services to U.S. Department of Defense installations in the Pacific region as a prime contractor. The vendor operates predominantly on a full-and-open basis with no set-aside designations across its recent federal award footprint.
The vendor's customer base concentrates heavily on DoD operations in Japan and the Pacific. The Navy holds 15 awards (49% of the vendor's award count), the Army holds 7 awards, and Pacific Air Forces holds 5 awards valued at $813 thousand in combined potential value. The Army Installation Management Command Pacific Region contributes 1 award with $627 thousand in combined potential value. These four customer lines account for 94% of recent awards. The dollar concentration diverges from award count: Pacific Air Forces and Army IMCOM account for $1.44 million of the vendor's $1.4 million combined potential value across all recent awards, while the Navy's 15 awards carry minimal individual ceiling values.
Nanseki Kaihatsu's recent work includes a $250 thousand single-award Blanket Purchase Agreement from Pacific Air Forces awarded March 5, 2025, for water storage tank cleaning services through March 4, 2030, and a $95.9 thousand purchase order from Pacific Air Forces effective May 1, 2026, for industrial water treatment at Kadena Air Base with completion targeted for April 30, 2031. The vendor also performs under a USAF Worldwide Engineering and Construction vehicle from the 2017–2022 period. Work is consistently performed in Japan. Activity is sparse across the five-year window — one award per year in 2024, 2025, and 2026 — with combined obligated dollars ($18.5 million) significantly exceeding combined potential value ($1.4 million), indicating substantial past performance against firm fixed-price and time-and-materials work. The vendor holds a single subcontract as of November 2024 performing superintendence and quality-control services on a WSP USA Environment & Infrastructure pump-house repair project.
Quick answers
Is Nanseki Kaihatsu Co.,Ltd. registered in SAM.gov?
Yes. Nanseki Kaihatsu Co.,Ltd.'s SAM.gov registration is active through July 22, 2027.
How much has Nanseki Kaihatsu Co.,Ltd. received in federal contracts?
Federal contracts obligated $19,144 to Nanseki Kaihatsu Co.,Ltd. in fiscal years 2023 through 2027.
What is Nanseki Kaihatsu Co.,Ltd.'s most recent federal award?
Nanseki Kaihatsu Co.,Ltd.'s most recent federal contract award is Industrial water treatment kadena AB (FA527026PB016), from Pacific Air Forces (USAF), on May 1, 2026.
On GovTribe
See Nanseki Kaihatsu Co.,Ltd.'s full federal record
- Federal contract awards
- IDV awards
- Subcontracting relationships
- Funding analysis by agency, NAICS and set-aside
- Similar vendors