noun
Refers to writing something in, such as filling in a form, making an entry in a ledger, or adding notes in the margin. Often used in compound nouns like 書き入れ時 (peak business period).
帳簿に数字を書き入れする。
I make entries of figures in the ledger.
年末は小売店にとって書き入れ時だ。
The year-end is the peak business period for retail stores.