noun
very beginning of a book
Rare literary expression referring specifically to the opening lines or first page of a book. Not used in everyday conversation.
開巻劈頭の一句が読者の心を掴む。
The very first line of the book captures the reader's heart.
A four-character compound of classical origin. 開巻 means 'opening a book', and 劈頭 means 'at the very start'. The exact historical derivation is uncertain, but it is a set phrase in literary Chinese and Japanese.