noun
Refers to a person who collects items as a hobby or profession, such as art, stamps, or antiques.
彼は有名な切手収集家です。
He is a famous stamp collector.
その美術館は個人収集家のコレクションを展示している。
The museum is exhibiting a private collector's collection.
Loanword from English 'collector', often used in similar contexts but can sound more modern or casual. 収集家 is a native Japanese compound with a slightly more formal or traditional feel.
Compound of 収集 (collection, gathering) and 家 (person, specialist). The variant 蒐集家 uses the older kanji 蒐, which carries the specific meaning of 'collecting' or 'gathering'.