The Kanjo-in Hall of To-ji Temple is a hall for performing important esoteric Buddhist rituals, with no statues of Buddha enshrined inside and a floor composed of cobblestones. The construction of this building was initiated by Kobo Daishi (Kukai) and completed during the reign of the second founder, Jiei Daitoku. After being destroyed by fire and rebuilt several times, the present Kancho-in Temple was rebuilt in 1634 with a donation from Tokugawa Iemitsu, and is designated as an important cultural property of Japan. Important ceremonies such as “Denpo Kantei,” the transmission of esoteric Buddhist teachings, and the “Go-Shichinichi Goshuho,” a prayer for the safety of the emperor, have been held at the Kanjo-in. On the 21st of each month, the anniversary of Kobo Daishi's death, the “Mikage Ku (memorial service)” is held as an occasion to express gratitude for his kindness.