Taisha are large jinja (Shinto shrines), or one of the 492 jinja categorized as Shikinai Taisha in the early Heian period text Jimmyocho (the list of deities) of Engishiki (codes and procedures on national rites and prayers), or those jinja that have adopted the suffix taisha.
大社（たいしゃ）とは大きな神社、または平安時代初期の延喜式神名帳に式内大社として列格される492の神社、または～大社と名乗る神社のこと。