The two sets of writings are mutually incompatible.

Regarding the documents that Taisekiji attributes to Nikko, Yamanaka Kihachi, one of the great Nichiren scholars of the twentieth century and an expert on Nikko's authenticated writings, has written an exhaustive study on Nikko. He examined ALL of his writings, including the Taisekiji documents that the Nichiren Shoshu attribute to him. His comments were as follows: "If one examines all the authenticated writings of Nikko and then compares them to the documents that are housed at Taisekiji, the authentic writings are 180 degrees apart from those at Taisekiji." The two sets of writings are mutually incompatible.