Public Notice of WTO government procurement
This is a system of application for qualification, bidding and contract procedures concerning products/services of all ministries and agencies and some public works. The Ministry of Defense uses this system for procurement of some products/services.
Search site for procurement notices of WTO government procurement (Online database of Japanese government procurement notices in JETRO website)
You can search for procurement notices of national governments at this website.
=> WTO Agreement on Government Procurement (Website of the Ministry of Foreign Affairs of Japan)