Nagurumi castle is located on a bluff on the west bank of the Tone River, about four km north of [[Numata castle]]. It was near two of the three [[highways]] between the [[Kanto|Kantô]] plain and [[Echigo province]], the Mikuni highway and the Shimizu highway. | Nagurumi castle is located on a bluff on the west bank of the Tone River, about four km north of [[Numata castle]]. It was near two of the three [[highways]] between the [[Kanto|Kantô]] plain and [[Echigo province]], the Mikuni highway and the Shimizu highway. |