However, after the mid Heian period, it was quoted in many books and a manuscript collection of the major itsubun (a composition that previously existed, but doesn't exist now) was put together before the Kamakura period at the latest (the manuscript is owned by the National Museum of Japanese History).
ただし、平安時代中期以後、多くの書物に引用され、遅くても鎌倉時代までに主要な逸文を集めた写本が作成された（国立歴史民俗博物館所蔵）。