Complex sentence: The "honji suijaku" paradigm remained a defining feature of Japanese religious life up to the end of the Edo period, and its use was not confined to just deities, but was often extended even to historical figures as Kūkai and Shōtoku Taishi.
Split into simpler sentences: The "honji suijaku" paradigm remained a defining feature of Japanese religious life up to the end of the Edo period. Its use was not confined to deities but was often extended even to historical figures as Kūkai and Shōtoku Taishi.