The time of their writing is also unknown, though the "Tsugi-shikishi" is believed to be from the mid-10th century to the first half of the 11th century and the "Sunshoan Shikishi" and "Masu-shikishi" from the second half of the 11th century.
書写年も未詳であるが、『継色紙』が10世紀半ばから11世紀前半、『寸松庵色紙』と『升色紙』が11世紀後半とされている。