Soson reached the mature stage in the mid-Muromachi period (around the fifteenth century), and it is said that the self-governing capability was very enhanced so as to respond to conflicts such as the Onin War.
惣村が最盛期を迎えたのは室町時代中期（15世紀）ごろであり、応仁の乱などの戦乱に対応するため、自治能力が非常に高まったとされる。