San-shikishi is a collective term for the "Tsugi-shikishi" (spliced shikishi), "Sunshoan-shikishi," and "Masu-shikishi" (square shishiki) and is one of the best examples of "kana-gaki" (writing in kana, as opposed to Chinese characters) calligraphy from the Heian period.
三色紙（さんしきし）とは、『継色紙』、『寸松庵色紙』、『升色紙』の総称であり、平安時代屈指の「かな書」の名筆（古筆）である。