Ninja's residence

Ninja's houses looks same as ordinary residence.In preparation for the sudden surprise attack, Ninja were making the escape route and hiding place in the house.Ninja usually had a normal life
as villagers.

Dondengaeshi

Dondengaeshi from upstairs

hidden stairs 

If small-scale attack, it was able to fight advantageously.This Ninja's house was also useful for escaping and stalling enemies.In Ninja's houses there were secret door called,"Dondengaeshi".
The wall rotates and it can be hidden on the other side.At the bottom of the altar, there is a hidden passage,so Ninja was able to escape out of the house.There was also a hidden staircase at the wooden floor.

Kougaryu Ninjyutsu Yashiki

Kougaryu Ninjyutsu Yashiki is real and only Ninja's house still exist.It was built in Edo period. Mochizuki family who were noble family of Koga Ninja made this tricky house of Ninja.In the Edo period,the world became more stable and peaceful than before but Mochizuki family ,based on the lessons learned from the past of oppression of the Koga Ninja, made perfect defence residence to be prepared for unforeseeable circumstances.

There is a pitfall ahead of "Dondengaeshi".

WEBSITE of Kouga Ninjyutsu Yashiki