cynanthropy
A rare, domain-specific term referring to the delusion of being a dog or being possessed by a dog spirit. Used in historical or psychiatric contexts.
犬憑きは、自分が犬になったと信じる精神状態を指す古い言葉だ。
Inu-tsuki is an old term for a mental state in which one believes they have become a dog.
Compound of 犬 (inu, 'dog') and 憑き (tsuki, 'possession'), from the verb 憑く (tsuku, 'to possess'). The exact historical origin is uncertain, but the term appears in older Japanese texts describing a form of spirit possession.