Abstract
A seamless geological map was created with a unified legend at the scale of 1:200000 covering the whole of Japan. This seamless map was based on the harmonization of regional geological maps made in various ages. A research scenario from basic geological research to Information Technology (IT) for distribution of digital geological maps was designed. The Type 2 Basic Research was proposed to distribute the interoperable data set of geological maps, which were transformed from the results of the Type 1 Basic Research on geological mapping. Seamless geological mapping was finally proposed as a full research program in geological research field.