(formerly known as Iwakuni Art Museum) is a museum of traditional Japanese art in Iwakuni, Yamaguchi Prefecture, Japan. The museum opened in 1963. The collection includes a National Treasure sword (of the Nanboku-chà  period, with an inscription in gold inlay of Tenshà  13 (1585)) and Important Cultural Property armour (haramaki, also of the Nanboku-chà  period).