If we guess that this waka was produced around the establishment of Taiho Code (in 701), judging from the period Hitomaro's flourished, there apparently were 'Fusuma Shoji' (an opaque sliding screen made of a wooden frame and thick paper) in limited places such as the fusumadokoro (place to sleep) in the Imperial Palace in those days.
人麿の活躍年代から推測して大宝律令（701年）制定の前後にこの歌が詠まれたとすると、その時代にごく限られた所、例えば御所の衾所（ふすまどころ寝所）などに「衾障子」があったと推測される。