This paper describes the characteristics and outline of the Japan trade EDI project and proposes a vision for the future. The results are as follows; First, the TEDI(Trade EDI) project was initiated to promote paperless trading(using XML documents) on open networks such as the Internet, and to construct associated legal structures. Second there is converting harbor EDI system in existing EDI to single window system. Third, the NACCS system has been put into operation in Japan. To develope NACCS system must associate other system such as financial, insurance, logistic.