A monument installed in a station square introduces its message related to be installed place because of the location. Therefore, it is considered that the expression structure consists of both the expression content is the message and the expression mode realizes the expression content. This basic study clarifies the expression structure and its tendencies of monuments in Shinkansen station squares by typifying their expression constituent elements and the relation between typified items. The following results were obtained about the expression structure and its tendency. The expression content is expressed by the motif. A motif is expressed with the form, the material and etc. The expression structure is constituted by the relation between classification items can be collected. There are combination patterns about the appearance of classification items. When two or more classification items appear, the tendency of the relation between classification items becomes complicated.
