In other castles, such functions were provided in a Ninomaru (second central castle compartment) or a Sannomaru (third central castle compartment), and the honmaru was a small area which functioned as a tsumenomaru during battle.
そうした機能は二の丸・三の丸に置き、本丸は面積を狭くして戦時における詰の丸としての機能を持つ場合もあった。