in terms of its formal structure , it follows the renga form , beginning with a three-line verse (ku ) of five , seven , and five syllables respectively , followed by a succession of two-line verses of seven syllables each , until a length of 36 verses (kasen ), 50 verses (goju-in ), or 100 verses (hyaku-in ) is reached . 形としては連歌の様式を踏襲し、五七五の句の後に七七の句を交互に付けていき、三十六句（歌仙）、五十句（五十韻）、百句（百韻）等よりなる。
there is a two-line okugaki (postscript ) ' written october (old calendar ) 2 , in the fourth year of eikyu (in 1116 ), these old eyes helped me put a period , old mototoshi ,' written by the same hand as the text on the fragment equivalent to the end of the last volume , and there is also written ' composition was completed on the same date ' by a different hand . 下巻末にあたる部分の断簡に、本文と同筆で「永久四年（1116年）孟冬二日、扶老眼点了、愚叟基俊」と二行の奥書きがあり、さらに別筆で「おなじとし月によみはてつ」と記されている。
