Sai-ji

Nihongo|Sai-ji|西寺| or the "West Temple" was one of the two large Buddhist temples established in Heian-kyō, the the present-day Kyoto. Right after the city was established in 794 as the new capital of Japan under an order of Emperor Kanmu, Sai-ji was establishet together with the other temple, Tō-ji (the "East Temple"). Each occupied a square site of approximately 300 m by 300 m situated symmetrically on both sides of the Suzaku-ōji (present-day Senbon-dōri), just north of the great Rashōmon gate along the southern edge of the city. While Tō-ji has survived (albeit rebuilt) into modern times, Sai-ji was burnt in 990 and 1233, then abandoned and never rebuilt.

The two tempes (together with Shingon-in in the imperial palace) were the only Buddhist institutions allowed in the capital at the time it was established. This policy was introduced by Emperor Kanmu in order to curb the political influence the large Buddhist institutions in Heijō-kyō (present-day Nara) had acquired during the 8th century.

Now a small park in Minami-ku, Kyoto, commemorates the temple at the site.