Hyakunin Bansyo Guardhouse

This was the biggest guardhouse located in front of the Ote-san-no-mon gate leading to Honmaru (main part of the castle) and Ninomaru (second part), for inspection of visitors who entered from Ote-mon gate.
One hundred samurai guard men, chosen from among the Kinsmen and loyal retainers of each of the four main branches of the Tokugawa clan, had their quarters there and worked in shifts day and night.