Iwakuni Chōkokan (岩国徴古館) is a public museum in Iwakuni, Yamaguchi Prefecture, Japan. Constructed between 1942 and March 1945 for the storage and display of the works of art and craft and historical materials donated by the Kikkawa family, former lords of Iwakuni Domain, the facility first opened in April 1944, operating fully as a museum from the beginning of the 1950s. The main building, by architect Satō Takeo (佐藤武夫), as well as storehouses of 1891 and 1944, are registered Tangible Cultural Properties, while the ancillary building constructed in 1931 as the former Kikkawa family offices in the city is a Prefectural Tangible Cultural Property. The collection includes a painting of Bukō Kokushi (仏国国師) of the Kamakura period and the Ōuchi Edition Sanjūin, a pocket-sized printed version issu