bookplate; ex libris
A label pasted into a book to indicate ownership, often decorative. The term is somewhat formal or bibliophilic.
My grandfather's books have beautiful bookplates pasted in them.
This bookplate was designed by a famous printmaker.
Compound of 蔵書 (collection of books) and 票 (label, slip). The term is a direct translation of the Western concept of a bookplate.