Kanetane's father-in-law and teacher, Atsutane HIRATA, left a fragment of "Koshi-den"; volumes 1 to 28 had already been finished, however, volumes 29 and 30 had been left halfway, and volume 31 onwards hadn't been written.
父であり師でもある亡き篤胤の未完の古史伝は、28巻迄出来上がり29巻～30巻の一部は書きかけで、それ以降は手付かずの状態であった。