Kajo Castle, also known as Kajo Park, is a historic castle located in Yamagata City, Japan. Built in the early 17th century, it served as the residence of the Yamagata Domain during the Edo period. The castle features a unique design with a central keep and surrounding moats, showcasing traditional Japanese architecture. Today, Kajo Castle is a popular tourist destination, surrounded by beautiful gardens and cherry blossom trees. The castle grounds also include a museum that highlights the history of the region and the castle itself, making it an important cultural site in Yamagata Prefecture.