In section 1328 of "Zatsuji-ki" (a record of miscellaneous matters) written by Hironori AJIRO, there is the word 'torinoko colored paper,' in the section of year 1356 of "Gukan-ki" (the diary of Michitsugu KONOE in Chinese characters) there is the word 'torinoko paper for writing,' and in section of year 1431 in "Kamon-nikki" (a diary written by Gosukoin) there is the word 'torinoko paper for writing.'
足代弘訓の『雑事記』の嘉暦3年（1328年）の条に「鳥の子色紙」の文字があり、『愚管記』の延文元年（1356年）の条に、「料紙鳥子」とあり、さらに後崇光院の『看聞（かもん）日記』永享七年(1431)の条にも「料紙（りょうし）鳥子」の文字が見える。