Union Construction Co., LTD.
Hachioji, Tokyo Part of East Japan Railway Company
- UEI
- HFWHH1GD7W75
- CAGE
- JSN46
- Primary NAICS
- 488210 Support Activities for Rail Transportation
- SAM.gov registration
- Active through
Company facts
- FY2025 rankings
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Its parent company, East Japan Railway Company, ranks:
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Not Tax Exempt)
- Corporate family
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Parent
Hachioji, Tokyo
L6KBGHE7V2U8
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Parent
Hachioji, Tokyo
L6KBGHE7V2U8
- SAM.gov registration date
- Physical address
- 1-8 Asahichō, Hachioji, Tokyo 192-0083, 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 | $206,539 |
| FY2025 | $0 |
| FY2024 | $37,441 |
| FY2023 | $65,705 |
Top agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Air Force | $206,539 |
Contract awards
Latest 5 listed here. See the rest on GovTribe.
Similar vendors
| Vendor | Location | Primary NAICS |
|---|---|---|
| Japan Freight Railway Company | Arakawa City, Tokyo | 488210 Support Activities for Rail Transportation |
| East Japan Railway Company | Hachioji, Tokyo | 482111 Line-Haul Railroads |
| Kotsukensetsu Co., LTD. | Shinjuku City, Tokyo | 488210 Support Activities for Rail Transportation |
| Tokyo Business Service Co.,Ltd. | Tachikawa, Tokyo | 561110 Office Administrative Services |
| Kamigumi Transport Corporation | Kobe, Hyogo | 423860 Transportation Equipment and Supplies (except Motor Vehicle) Merchant Wholesalers |
About the company
Union Construction Co., LTD., a Tokyo-based child entity of East Japan Railway Company, provides railroad sidetrack maintenance and repairs to the U.S. Air Force as a prime contractor on full-and-open purchase orders with no set-aside designations. The company operates exclusively as a prime (100% of recent awards) and serves only two federal customer agencies, with all work performed at Yokota Air Base in Japan.
Union Construction Co., LTD. has held a consistent, recurring contract relationship with Pacific Air Forces spanning at least five fiscal years. The vendor has received annual firm fixed-price purchase orders for maintenance and repairs to U.S. Government Sidetrack No. 328 at Yokota Air Base, with contract values ranging from approximately $51,500 to $226,900 per year. Recent awards include a $220,730 purchase order covering the period November 19, 2025, through October 31, 2026; an $86,462 purchase order running October 1, 2024, through September 30, 2025; a $51,514 purchase order for FY24 maintenance awarded October 1, 2023; and a $107,476 purchase order for FY23 maintenance awarded October 1, 2022. The vendor also holds a single $140,000 award from the Defense Logistics Agency Energy for related sidetrack services. Across all awards in the source data, the company delivers labor, materials, transportation, equipment, supervision, and project management to maintain railroad infrastructure to operational standards, with emphasis on inspection, routine maintenance, and electric systems work.
Customer concentration is extreme: Pacific Air Forces accounts for 86% of combined potential value across six awards ($866 thousand), with Defense Logistics Agency Energy accounting for the remaining 14% ($140 thousand). Activity has remained flat at one award per year across the past five years, with total combined potential value at $1 million and $1 million obligated. One award valued at $221 thousand faces ultimate completion within the next twenty-four months and enters recompete. The vendor's footprint is narrowly specialized in rail transportation maintenance (NAICS Support Activities for Rail Transportation, PSC Maint/Repair/Rebuild Of Equipment- Railway Equipment) with no subcontract activity.
Quick answers
Is Union Construction Co., LTD. registered in SAM.gov?
Yes. Union Construction Co., LTD.'s SAM.gov registration is active through June 23, 2027.
What is Union Construction Co., LTD.'s CAGE code?
Union Construction Co., LTD.'s CAGE code is JSN46, and its Unique Entity ID (UEI) is HFWHH1GD7W75.
How much has Union Construction Co., LTD. received in federal contracts?
Federal contracts obligated $309,685 to Union Construction Co., LTD. in fiscal years 2023 through 2027.
How does Union Construction Co., LTD. rank among federal contractors?
Union Construction Co., LTD.'s parent company, East Japan Railway Company, ranked #32 in PSC J022 and #41 in NAICS 4882 in FY2025.
What is Union Construction Co., LTD.'s most recent federal award?
Union Construction Co., LTD.'s most recent federal contract award is Maintenance and repairs to the sidetrack roadbed portion of U.S. Government sidetrack no. 328, yokota air base the… (FA520926P0004), from Pacific Air Forces (USAF), on November 19, 2025.
On GovTribe
See Union Construction Co., LTD.'s full federal record
- Federal contract awards
- Funding analysis by agency, NAICS and set-aside
- Similar vendors