Therefore, the large gozoku (local ruling family) like Ki clan along the Kino-kawa River that had natural bays in Seto Inland Sea and wood production areas in the backlands flourished with their own suigun.
紀の川流域の紀氏のように瀬戸内海に対する天然の良港を持ち、後背に木材産地を確保した大豪族も独自の水軍をもって活躍した。