An ancient writing describing shitsurai (putting decorations suitable to the season or a ritual onto an appropriate indoor place) in a house built in the manner of Heian period palatial architecture contains a statement that 'the lacquered structure of akari shoji was covered with cloth or paper after the erection of pillars and the construction of kamoi (a narrow piece of wood that passes over the sliding doors and around an entire Japanese room).'
寝殿造りの室礼を記した古文書の中に、「柱をたてまわして鴨居を置きてのち、塗子（ぬりこ）の明かり障子を間ごとに覆う」とある。