Natonal Museum of Japanese History The National Museum of Japanese History (Kokuritsu Rekishi Minzoku Hakubutsukan), generally called Rekihaku, opened in March of 1983. It is the only museum of Japanese history in Japan which supports systematic research and exhibitions of Japanese history and culture. Located in the corner of the Former Sakura Citadel Park, this fortress of history occupies a grand total of 35,000 sq.m. on a site of 130,000 sq.m. [eng]