Although Fukushima Castle was well-designed and was conveniently close to the port at Naoetsu, Tadateru found that it was too small for his forces, and was also subject to frequent flooding.
Deși Castelul Fukushima a fost bine proiectat și a fost în mod convenabil aproape de portul din Naoetsu, Tadateru a descoperit că era prea mic pentru forțele sale și că era supus inundațiilor frecvente.