Ido-ji (Japanese: 井戸寺) is a temple in Tokushima, Tokushima Prefecture, Japan. It is Temple # 17 on the Shikoku 88 temple pilgrimage. The main image is of Yakushi Nyorai (Bhaisajyaguru).
The temple was constructed in 673 during Emperor Tenmu's reign. During the Tenshō (天正) era (1582), the temple during fighting between the forces of Chōsokabe Motochika (長宗我部 元親) and Sogō Masayasu. In the Manji (万治) era (1661), the temple was rebuilt with the support of Hachisuka Mitsutaka.
Upon entering the Niō Gate, a purification pavilion (temizuya) is situated to the left, while the Main Hall stands at the far end directly ahead. The Daishi Hall is located to the right in the foreground, and to the left stands the Higiri Daishi Hall, which houses the "Well of Reflections" (Omokage no Ido). A bell tower stands adjacent to these structures; the Nokyōjo (Pilgrim's Office) is located within the living quarters (kuri) situated behind and to the left of the Higiri Daishi Hall, while the Dainichi Hall is built to the left of that building.
Temple Lodging (Shukubō): None Parking: 30 cars, 5 buses. Free of charge.
Known as "Mine no Yakushi," this site is said to be a sacred ground where Kūkai himself entered the mountains and established Shingon Esoteric Buddhism, recognizing it as a place perfectly attuned to the "Three Mysteries" (Sanmitsu). Its inner sanctuary—Jōgon-ji Temple in Tatari-dani—is associated with a local legend identifying it as the burial site of Prince Shōtoku. Location: 2-3-2 Minamishō-machi, Tokushima City, Tokushima Prefecture (34°4′12.1″N 134°30′53.9″E / 34.070028°N 134.514972°E)
Founded during the Heian period by Shobo Rigen Daishi. It features a rare "Maimai Well"—a unique structure containing a spiral ramp that allows visitors to descend all the way to the bottom of the well. It has been designated a Tokushima City Heritage Site. Location: 3 Miyanomoto, Shibahara, Kokufu-cho, Tokushima City, Tokushima Prefecture(34°5′33.8″N 134°27′46.8″E / 34.092722°N 134.463000°E)
16 Kannon-ji --(2.8 km)-- 17 Ido-ji --(16.8 km)-- 18 Onzan-ji
32 Kannon-ji (Kannonji, Kokufu-cho, Tokushima City) -- 33 Ido-ji—1 Kannon-ji (Semimachi, Tokushima City)