The site of Fukuoka City is located in the center of Fukuoka City. It was built by the Kuroda family in 1601. The castle is divided into three layers, the most central is the main city, then the outer is Erdao City, and the outer is Sandao City. There are 47 arrow towers built. At present, there are only three arrow towers left. Many people hear about them, see the tide and pray for them. All the castles were destroyed by the U.S. Army during World War II.