The taiko yagura was a building which had the same role as a drum tower in a temple and which normally announced the time of gate openings at sunrise and sunset.
太鼓櫓（たいこやぐら）は寺院の鼓楼と同じ役割を持つ建物で、常時は日の出と日暮れの開門の時刻を知らせた。