English: The Uzumi Gate of Nagoya Castle led to an underground tunnel that ran beneath the castle walls. This tunnel was the secret escape rout to the be used by the lord of the castle during times of emergency. The remains of the entrance can be found in the northwest part of the Ninomaru Garden. Steep stairs led down to the moat. The lord could cross the moat by boat to reach the Ofukemaru Garden on the opposite side. He could use a secret escape route to get to the Kiso Road by way of Doishita, Kachigawa and Jokoji Temple.