Ko was systemized as the leader called 'Banyaku' (the role of a guard) without respect for the social class, and was connected to the head temple of Hongan-ji Temple through 'Toritsugiyaku' (the role of a negotiator).
講は「番役」というリーダーを中心に、身分の区別なく組織され、「取次役」を通じて本山の本願寺と繋がっていた。