It is not clear when a castle was built at this location, which is located between central Okayama city and the Takahashi River. Historically this area had been a granary area and the main base of ancient
Kingdom of Kibi. The route of the
San'yōdō highway which connected
Kyoto with
Shimonoseki passed through natural levee just at south of the castle. During the early Sengoku period, the Mimura clan ruled the entire Bitchu region from Bitchu-Matsuyama Castle, and the Mimura ordered their vassals, the Ishikawa clan, to build a fortification at this site. The Ishikawa and Mimura were destroyed by the
Mōri clan in 1575, and the castle was awarded to
Shimizu Muneharu, a senior vassal of the Ishikawa who had defected to the Mōri. In 1582,
Hashiba Hideyoshi was ordered to conquer western Japan by
Oda Nobunaga and laid
siege to Takamatsu Castle. As Takamatsu Castle was surrounded by marshes, it was considered impregnable to a normal assault and was expected to be able to withstand a prolonged siege. However, Hideyoshi adopted an innovative approach at the suggestion of his strategist
Kuroda Kanbei. By paying extravagant amounts of money for round-the-clock efforts, he completed a three-kilometer long dike, damming the outlets to the marshes within 11 days. Aided by the arrival of the
rainy season, the castle was soon flooded. Shimizu Muneharu was forced to surrender, committing
seppuku in exchange for the lives of his troops. Following this siege, and the rise of Toyotomi Hideyoshi to power after the assassination of Oda Nobunaga, the castle became part of the territory of
Ukita Hideie, who assigned it to his
karō,
Hanabusa Masashige. Following the
Battle of Sekigahara in 1600, the Ukita clan sided with the losing Western army; however, the
Hanabusa clan fought alongside the Eastern Army of
Tokugawa Ieyasu, and were awarded
hatamoto status as direct retainers of the
Tokugawa shogunate. Some years later the Hanabusa relocated from Takamatsu to Abe, in what is today
Sōja city and the castle was abandoned. Today, only a portion of the dam built by Hideyoshi and a small part of the castle's masonry has survived, and almost no trace of the castle remains. The ruins include the alleged burial mounds for Shimizu Muneharu's head, and for his body. The site has been maintained as the , with markers, such as wooden posts, show the area where the castle, dikes, and siege equipment were once located and where Shimizu Muneharu committed suicide. On April 6, 2017 Bitchu Takamatsu Castle was designated by the Japanese Castle Foundation as Okayama Prefecture's only entry on the
Continued Top 100 Japanese Castles (続日本100名城). The list adds to the original Top 100 list totaling 200 castles. Bitchu Takamatsu Castle is listed as #171. The castle ruins are a ten minutes walk from
JR West Kibi Line Bitchu-Takamatsu Station. == In popular culture ==