冊さつ

さ

つ

Common wordJLPTN1Freq.FrequencyTop 5,000

Meanings

1

counter for books; counter for volumes

Used to count books, magazines, notebooks, and similar bound printed matter. Attaches directly to numerals.

彼かれは年ねん間かんに五ご十じっ冊さつ以い上じょうの本ほんを読よむ。

He reads more than fifty books a year.

2

rare term

Rare standalone noun meaning a single bound volume. In modern Japanese, 本 or 書物 is far more common.

〈物もの〉を〈数かず〉冊さつ買かうto buy ... book(s)/volume(s)
本ほんを三さん冊さつ買かった。
I bought three books.

本ほんN5sense 1
本 is the general noun for 'book' and also a separate counter for long, cylindrical objects, while 冊 is used only as the counter attached to numerals when counting bound volumes.
部ぶN2sense 1
部 counts copies of a publication (e.g. printed run), whereas 冊 counts individual physical volumes regardless of how many are identical copies.
札さつN3
札（さつ）means a banknote, while 冊（さつ）is the counter for bound books, so despite sharing a reading they are unrelated words.
サツ
冊 (さつ) is the counter for books and bound volumes, unrelated in meaning to サツ, the slang word for police, though they sound identical.

The kanji 冊 originally depicted bamboo slips bound together, representing a book or volume. The reading さつ is the on'yomi.