It has been generally thought that the extant edition of Hasedera-genki was completed in the early Kamakura Period. It is indisputable that the work was started in 1200 as the year is mentioned in the seventeenth episode of the first volume. But the date of its completion seems to be founded on very weak reasoning; the book must have been finished in the early thirteenth century because there is no description of the destruction by fire of Hase Temple which occurred in 1219. Relying on textual evidence rather than circumstantial one, hereI will demonstrate that Hasedera-genki was finished not in the early but in the late thirteenth century.