also: ペン・クラブ
PEN club; writers' association
An international association of writers, originally for poets, playwrights, essayists, editors, and novelists. The name is an acronym from those categories.
彼は日本ペンクラブの会員です。
He is a member of the Japan PEN Club.
From English 'PEN club', an acronym for Poets, Essayists, Novelists (and later Playwrights and Editors).