In the "Zatsuji-ki" (record of miscellaneous affairs) written by Hironori AZIRO (around 1328) there is a description that said; 'I copied the Lotus Sutra on torinoko colored paper,' in the section of 1356 in the "Gukan-ki" (the diary of Michitsugu KONOE in Chinese characters), there is a description as 'ryoshi toriko,' and furthermore, in the section of 1431 in "Kanmon-nikki" (the diary of Gosuiko-in) the word 'ryohi toriko' is seen as well.
足代弘訓の『雑事記』（嘉暦3年（1328年）頃に成立）に「鳥の子色紙に法華経を書写した」との記述があり、『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『看聞日記』永享7年（1431年）の条にも「料紙鳥子」の文字が見える。