The Tokugawa thus celebrated the ancestral religion of Shinto glorified by the monumentally opulent shrines they built at Nikko.
The Tokugawa did not build any Shinto shrines.
mnli hypothesis: The Tokugawa did not build any Shinto shrines. premise: The Tokugawa thus celebrated the ancestral religion of Shinto glorified by the monumentally opulent shrines they built at Nikko.