Saga Castle (佐賀城? Saga-jō) is a Japanese castle located in Saga City, Saga Prefecture, Japan. It is a hiraijirō, a castle built on a plains rather than a hill or mountain, and is surrounded by a wall rather than being built above a stone base. Saga castle was home to the Nabeshima clan, daimyō of Saga Domain. It was also known as "Submerged Castle" (沈み城 Shizumi-jō).
Saga Castle is a ten minute bus ride south of Saga Station on the Nagasaki Main Line. Saga is around 45 minutes on the Limited Express from Hakata Station in Fukuoka and about 25 minutes by local train or 15 minutes by Limited Express from Shin-Tosu. From Nagasaki Station in Nagasaki, Saga is around 80 minutes by train. From Kumamoto take the Kyushu Shinkansen to Shin-Tosu (25 minutes) and change to either a local train or Limited Express.
Comprehensive List of Major Castles in Japan