This is a market survey for a future Design-Bid-Build construction project to comprehensively upgrade HVAC and related systems at Building B100 on Kadena Air Base, Okinawa, Japan. The project has an estimated budget range of ¥800 million to ¥1 billion and an estimated performance period of 485 calendar days. The work is strictly limited to local sources, defined as firms physically located and licensed to conduct this specific type of construction business in Japan. The scope includes installing new mechanical equipment, a control system, environmental remediation, and full system commissioning. This notice is for planning purposes only and is not a solicitation.