ベストセラー

べすとせらー
noun
bestseller
1. bestseller, best-selling item
A product, especially a book, that sells in very large numbers. Most commonly used for books but can apply to any popular product.
この(ほん)ベストセラーになった。
This book became a bestseller.
A new work by a bestselling author came out.
書店(しょてん)ベストセラーランキング何週間(なんしゅうかん)(はい)(つづ)いる
It has been on the bookstore's bestseller ranking for weeks.

Usage

ベストセラー is primarily associated with books in Japan, though it can be used for other products. It often implies significant cultural impact, not just high sales.

Common collocations

Similar words

ロングセラー (long-seller) is a wasei-eigo term for a product that sells steadily over a long period, as opposed to a ベストセラー which implies a sales spike.