The aim of this paper is to clarify the forms of assembly of plural station squares in central Tokyo in terms of spatialcompositions with surroundings. Initially, combinations of station squares around a station building are analyzed. Secondly,connections between those squares are analyzed through common elements such as passing streets and bu ildings which canbe seen from several squares. Finally, Finally 4 forms of assembly are clarifi ed: unity of similar squares, one-sided integration ofsquares by building scale, connection of dissimilar squares with common railway tracks in canal bed, and indirect connectionof squares with common distant high-rise building.