A number of national government organisations have established mailing list services to announce their calls for tender.  The mailing lists are almost exclusively in Japanese. Listed below are links to registration pages for procurement information mailinglists at a number of government organisations. 

• Cabinet Office
• Japan Aerospace Exploration Agency JAXA)
• Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
• Japan Science and Technology Agency
• Ministry of Agriculture, Forestry and Fisheries
• Ministry of Economy, Trade and Industry
• RIKEN