noun
circulation; number of copies printed
Refers to the total number of copies printed for a publication, such as a book, magazine, or newspaper. Often used in publishing and media contexts.
この雑誌の出版部数は毎号約10万部です。
The circulation of this magazine is about 100,000 copies per issue.
出版部数が少ないため、この本はすぐに品切れになった。
Because the number of copies printed was small, this book quickly went out of stock.
Compound of 出版 (shuppan, 'publishing') and 部数 (busū, 'number of copies').