The Tokyo to JGD2000 datum transformation converts coordinates from the Tokyo datum to the JGD 2000 (Japan Geodetic Datum of 2000) using a grid file defined by GSI (Japanese Geographical Survey Institute). This transformation uses bilinear interpolation.
The file is named TKY2JGD.par, and it can be downloaded from our website:
https://www.bluemarblegeo.com/geographic-calculator-download/
Note: The definition of datum transformations using this method includes parameters specifying the required grid files. If the system cannot find the specified file, the shift will be marked unusable in the Datasource and may not be selected for use.