Adjacent to Choraku-ji stands Serada Tosho-gu, a shrine enshrining Tokugawa Ieyasu as a deity, built in 1644. Serada was the home of the Nitta-Serada clan, from whom the Tokugawa claimed descent, and by placing Ieyasu's mausoleum in this ancestral land, the shogunate reinforced its dynastic legitimacy. The shogunate had also renovated Choraku-ji's precinct in 1617, elevating the religious authority of the entire site.