Karatsu Castle was completed by Hideyoshi Toyotomi's vassal, Shima Morihiro Terasawa, spending seven years from Keicho 7 (1602).
It is reported that the castle was built using the remains of Nagoya Castle.
It is also known as "Maizuru Castle" because the sandy beach centered on the castle and Matsubara look like a crane with its wings spread.

In 1877, the ruins of Honmaru became Maizuru Park, and there was no castle tower at the beginning of Karatsu Castle, but in 1966 the castle tower was built as a cultural tourism facility. The castle tower is a local museum, where materials from the Karatsu clan and Karatsu ware are displayed and you can experience the history of Karatsu.
In Maizuru Park, cherry blossoms are in full bloom in late March, and wisteria, which has a charming scent from late April to early May, are in full bloom. You can see the magnificent scenery of Matsuura Bridge and the castle town Karatsu.