Nihonmatsu-jo (also known as Kasumiga-jo) was constructed as an early modern period castle by Mitsushige Niwa, the first feudal lord of Nihonmatsu Han, who entered Nihonmatsu in 1643. Han were assessed by rice production and Nihonmatsu Han of 100,000 koku fought severely against the newly formed imperial army during the Boshin War. At last the castle was surrendered to the opponent, leaving a sad story of how Nihonmatsu young teenage corps (Samurai) were killed in the war. Currently, the history of the area is remembered by beautiful gardens in Ishigaki and is restored as a prefectural natural park.
The natural landscape is soothing no matter the season, but in spring as many as 5,000 cherry blossom trees bloom and the scenery is like a dream, as if the whole castle were covered with thin red haze. It is said that “Kasumiga-jo” is named because of this reason.