Considering that pictures were executed on Sugi-shoji and it was used as an alternative wall, it can be thought of as a kind of development of Fusuma-shoji of Shitsurai, and it was mainly used for partitions between verandas and rooms or on the veranda as well as a shoin window (study or guest room in Japanese residential architecture) resembling a bay window.
杉障子には絵を描き、壁の代用にも用いていたことは、室礼としての襖障子の延長とも考えられるが、主に縁側と部屋との仕切りや縁上の仕切りにに使用され、また出窓形式の書院の窓にも使用されていた。