historic customary reading of a kanji word
A technical term in Japanese linguistics referring to a reading of a kanji compound that is based on historical or customary usage rather than standard on'yomi or kun'yomi rules. Often encountered in discussions of classical texts or traditional readings.
"Kojitsuyomi" is a technical term that refers to the historic customary reading of a kanji word.
Compound of 故実 (historical fact or custom) and 読み (reading). The exact historical derivation is uncertain, but the term is used in Japanese philology to describe kanji readings preserved through tradition.