Belief in Tenjin (heavenly deities) increased during the Heian period and SUGAWARA no Michizane (Tenjin) was enshrined alongside the existing deities, leading the shrine to become named Tenjin-gu Shrine.
平安時代、天神信仰が高まり、当社に菅原道真（天神）が合祀され、以降、天神宮と呼ばれるようになった。