レファレンス福岡データベース を見て
スサノオについて調べていた時に、中世（日本でいえば平安時代後期から戦国時代にかけてのおおよそ11世紀後半から16世紀後半まで）に出雲大社の主祭神がスサノオだった時期があるという情報を見つけた。
記事中に「杵築大社の祭神をスサノヲだとする考え方は、すでに平安時代のかなり早い時期から一部で説かれつつあった」と書かれていた。
（杵築大社は出雲大社の古い呼び名）
出雲大社の主祭神といえば「オオクニヌシ」だとばかり思っていたので驚いた。
メモ代わりにつぶやきとして残しておく。
English Summary
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Please note: This summary was generated using AI translation (DeepL or Gemini). While we strive for accuracy, some technical terms or subtle nuances of local history may differ from the original Japanese.
Topic: The Hidden Era: When Susanoo was the main deity of Izumo Taisha.
Summary: The author shares a surprising historical finding: although Okuninushi is currently the main deity of Izumo Taisha (formerly known as Kitsuki Taisha), there was a long period during the medieval era (from the late Heian to the Sengoku period) when Susanoo no Mikoto was enshrined as the primary god. According to archival databases, this shift in belief began as early as the Heian period. This discovery serves as a reminder that the identities of gods at famous shrines have often shifted due to political and religious influences over the centuries.
