
Four companies worked one guardhouse in shifts 百人番所
Four musket companies — Koga, Iga, Negoro and Nijugoki — took day and night shifts at the Hyakunin-bansho, the guardhouse standing past Edo Castle's third gate, just before the Nakanomon leading to the main compound. Each company comprised twenty officers and a hundred men, and the building runs forty-five metres north to south.
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