Abstract
The agreement on government procurement of World Trade Organization (WTO) had been effective in Japan in January 1996. This agreement created the big impact to not only the governmental organizations but also the whole construction industry in Japan. Almost 20 years have passed since then. For confirming this agreement, publick work proquirment systems have been modified. However, it still remains matters need to reconsider. The tipical matter is handling system for additional cost claim cleated with misunderstanding of Article XV: Limited Tendering. Most of public sectors set up the strange evaluation and settlement system of additional cost claim. The system is saying that the additional cast will be paied until aqumrated 50% of the original contract amount, but the over the portion will not be paied. This paper is discussing about the problems and those countermeasures for international agreaments mainly WTO.
