noun
philatelist; stamp collector
A person who collects and studies postage stamps as a hobby.
彼は熱心な郵趣家で、珍しい切手をたくさん持っている。
He is an enthusiastic philatelist and owns many rare stamps.
Compound of 郵 (mail) + 趣 (taste, interest) + 家 (person), literally 'person with an interest in mail'.