Wikipedia
Zentsū-ji
The is a temple of the Shingon sect in Zentsūji, Kagawa, Japan. It was established by Zentsū Saeki, the father of Kūkai, in 813. The East Academy (Tō-in) and the West Academy (Sai-in) are within Zentsu-ji precincts. The West Academy is Kūkai's birthplace.
Zentsū-ji is temple No. 75 in the Shikoku Pilgrimage. It is also one of the three temples on the tour, that Kūkai visited, the others being Tairyūji and Muroto Misaki, as Kūkai mentioned them by name in his writings.