The U.S. Army Corps of Engineers is exploring alternative acquisition strategies—Progressive Design-Build and Integrated Design & Construction—for a planned FY28 project to construct a new 66kV electrical substation and frequency converter plant at Yokohama North Dock, Japan. The project will provide permanent 60Hz shore power for U.S. military watercraft, including the main facility, supporting utilities, site improvements, cybersecurity, and fire protection. The estimated cost magnitude is between ¥7,500,000,000 and ¥15,000,000,000 Japanese Yen. This market survey is intended only for local sources physically located and authorized to conduct construction business in Japan, holding a Japanese civil construction or architectural construction license. Interested firms must be registered in SAM, and responses will be used for market research and acquisition decision-making.