In-depth article Odawara, KanagawaOdawara Castle小田原城To face Toyotomi Hideyoshi, its lords wrapped the whole town, not just the castle, in 9 km of moats and earthen walls.Japan's 100 Fine Castles No. 21CastleHilltop Suicasmo · CC BY-SA 4.0 · Wikimedia Commons