is a Shingon temple in Matsuyama, Ehime Prefecture, Japan. It is Temple 52 on the Shikoku 88 temple pilgrimage, and Temple 3 on the Thirteen Buddhist Sites of Iyo. The Hondà  is a National Treasure.
Taisan-ji is said to have been founded by a wealthy merchant from Kyushu in the sixth century, after he had been saved from a shipwreck by Jà «ichimen Kannon. The temple enjoyed imperial patronage from the time of Emperor Shà Âmu.