GSI, CRL and HD had a joint GPS campaign April 21 through 23, 1997. The purposes of the campaign, Project97, are to provide local ties between VLBI, SLR and GPS permanent stations, and to determine coordinate transformation parameters on the "Tokyo-taisho" datum origin of Japan. Kashima 26m VLBI antenna, Tsukuba IGS GPS station (TSKB), KSP stations, Shimosato SLR station and some stations of GSI's GPS array were tied each other in this campaign. These local ties enabled us to compare coordinates measured by VLBI, SLR, and GPS in Japan. One of error sources of this comparison is error of station coordinates in ITRF. We found that consistency of ITRF96 station coordinates had improved compared to ITRF94 coordinates. Coordinate transformation parameters from Tokyo Datum to ITRF depend on the place of collocation because of the distortion of the geodetic network. We, geodesists of Japan, have wanted to have the parameters at the datum origin. We established a new official coordinate system "Tokyo97", which represents Tokyo Datum. The parameters from ITRF94 to Tokyo97 are T1 = 146.414m, T2 = -507.337m, T3 = -680.507m, D = 0.00, R1 = 0.00, R2 = 0.00, R3 = 0.00. These parameters are being used to establish the Japan Geodetic Datum 2000.