It is a compilation of Ushin renga (elegant, subtle and profound works) created by about 250 poets including Shinkei, Sozei, Emperor Gotsuchimikado, Senjun, and Masahiro OUCHI.
心敬・宗砌・後土御門天皇・専順・大内政弘など約250人の句を集めた有心連歌の集大成である。