noun
faction; private party; clique
Refers to a political faction or a small group formed around private interests, often within a larger organization. The term can carry a slightly negative nuance of self-serving or exclusive grouping.
党内にいくつかの私党が存在している。
Several factions exist within the party.
彼は私党を組んで権力を握ろうとした。
He tried to seize power by forming a clique.
Compound of 私 (private, personal) and 党 (party, faction). The exact historical derivation is uncertain, but the word follows a standard Sino-Japanese compounding pattern.