Entire district has the Dobei, the mud wall, and stone floors which offers walking around in Edo period. Also, the gardens in this area take water from Ono Canal which is the same system since Edo Period.
... is the protection for the mud walls. It prevent the wall from icing and snow.
The Nagaya gate of Amano House
It is remaining gate located in Nagamachi. Amano was Samurai with 300 koku which considered they were high-calls of Samurai.