Maruoka Castle (丸岡城, Maruoka-jō?) is a Japanese castle, located in Maruoka, Fukui, and famous for its donjon (tenshu), the oldest in Japan. Built in 1576 by order of Shibata Katsutoyo, only the central tower (tenshu) remains; the grounds are used by the local populace for festivals such as hanami and traditional parades. The castle is also known as Kasumi-ga-jō (Mist Castle) (霞ヶ城, Kasumiga-jō?) due to the legend that whenever an enemy approaches the castle, a thick mist appears and hides it.
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Coordinates: 36°09′08″N 136°16′20″E / 36.152347°N 136.272097°E / 36.152347; 136.272097