noun
beginning of a text; opening passage
Refers to the first sentence, paragraph, or section of a written work. Common in contexts like essays, articles, and stories.
この小説の書き出しはとても印象的だ。
The opening of this novel is very striking.
作文の書き出しに何を書けばいいか分からない。
I don't know what to write for the beginning of my essay.
noun
written claim; bill
Dated term for a formal written demand or invoice. Rare in modern usage; now usually expressed with 請求書 or similar.
昔は、書き出しを送って支払いを求めたものだ。
In the old days, they used to send a written claim to demand payment.
Compound of 書き (kaki, 'writing', continuative form of 書く) + 出し (dashi, 'taking out', continuative form of 出す). Literally 'writing out', it came to mean the beginning of a written piece.