Otemon, the main gate, with the donjon in the background 

 

Tsume-mon which has a corridor that connects Honmaru and Ninomaru 

 

Ranma above the fusuma sliding doors shows great waves.

This main hall is located next to the donjon.

 

The official meeting room with an elevated floor is only for 

the feudal lord.  Behind the sliding doors on the left, there

is a secret hidden room for guarding-samurai.   

 

On the end of the rooftop, there is a heavy ridge-end tile like this.

 

View from the top of the castle donjon  

 

Kurogane-mon, the Iron Gate

Many iron plates were nailed on the doors.   

 

Ishi-otoshi, device for dropping stones against intruders 

 

Ishi-otoshi and Shinobi-gaeshi, device for keeping intruders off

 

The donjon of the 240-thousand-koku castle in Tosa Province