On the other hand, Saiga shu placed its headquarter at Saiga-jo Castle and built up the line of defense with Tozenjiyama-jo Castle, Joge Fort (上下砦), Usayama Fort, Nakatsu-jo Castle (Kii Province) in the north, Kosaki Fort (甲崎砦), Tamatsushima Fort and Nunobikihama Fort in the south and barriers on the riverside, centering on Mirokuyama-jo Castle along the Saiga-gawa River (Waka-gawa River).
これに対し雑賀衆は雑賀城を本城となし、雑賀川（和歌川）沿いに弥勒寺山城を中心として北に東禅寺山城・上下砦・宇須山砦・中津城(紀伊国)、南に甲崎砦・玉津島砦・布引浜の砦を築き、川岸には柵を設けて防衛線を構築した。