The Geographical Survey Institute is constructing the new geodetic reference frame of Japan using space techniques. The current framework based on Tokyo Datum was established at the end of the nineteenth century and has served as a national reference for this centenary. However, it has a large internal distortion and a shift from a geocentric reference frame was revealed by space geodetic techniques.

The new framework is being built referred to ITRF94 at the epoch of 1997.0. The coordinates of Kashima VLBI station are determined in ITRF94 by international VLBI observations. Positions of two additional VLBI stations are determined by domestic VLBI observations referred to Kashima station. The framework composed of 600 permanent GPS stations are determined using these three VLBI stations as anchor points. The coordinates of the first- through third-order triangulation points are resurveyed and/or recalculating in this frame. The fourth-order triangulation points will be mapped by an interpolation method.

In this presentation, we report the recalculation process and the error assessment.