井せい楼ろう

noun

wooden watchtower; battlefield watchtower

Historical term for a wooden tower used for observation in warfare, especially during the Sengoku period.

• 戦せん国ごく時じ代だい、井せい楼ろうは敵てき陣じんを見み張はるために使つかわれた。

  During the Sengoku period, wooden watchtowers were used to keep an eye on enemy positions.