establishing oneself independently; forming rival factions; regionalism; (of powerful groups) to establish themselves in various regions and contend for supremacy

💡 Nuance & Usage: Often used to describe a situation where multiple groups, organizations, or individuals establish their own power bases or territories and operate independently, sometimes in rivalry or competition. It implies a fragmented or decentralized power structure. (複数の勢力や組織が、それぞれ独立した拠点や勢力圏を築き、互いに競い合う状況を表す。政治、経済、文化など幅広い分野で使われる。)