It is conceivable that emergence of the new books mentioned in the foregoing was propelled by the underlying rivalry against the historiography on the Buddhism "Busso Toki" (Genealogy of the Buddhist Patriarchs) which was compiled from the Tendai Sect perspective.
そこには、天台宗の立場から編纂された仏教史書である『仏祖統紀』への対抗意識も潜在的に有していたことが考えられる。