As mentioned above, from the end of middle ages to the early modern ages, the armed forces on the sea in Japan changed from independent kaizoku shu to suigun that was put under control of daimyo and incorporated into military force of public power on the sea.
このようにして、中世末期から近世の初頭にかけて日本の海上勢力は自立した海賊衆から大名の統制に服して公権力の海上における軍事力である水軍に転化させられてゆく。