[1] It was the center of the old Obi Domain, now a part of Miyazaki Prefecture.

Obi Castle was founded by the Tsuchimochi clan in the Nanboku-chō period, but most of its structure comes from the mid-1400s.

The castle was in initially in Shimazu hands, until it was lost to the Itō clan in 1587.

The Itō clan continued to rule it until the Meiji period,[3] expanding it and making it more defensible, with the castle town protected on three sides by the Sakatani river.

Refurbishing the town brought it into line, in terms of historical authenticity, with the era of the castle, making both authentically reflective of a castle town dating from the Edo period.