The northernmost Japanese-style castle was the predecessor of the Fukuyama-kan built by the first Matsumae feudal lord, Keiyō Matsumae, and was completed in the first year of Ansei (1854) with seven taijas on the Sannomaru facing the sea for foreign ship strikes. In 1941, a wooden castle tower was designated as a national treasure, but eight years later it was destroyed by fire. A reconstruction tower made of reinforced concrete was completed in 1960 at the wishes of the townspeople. The remains of the Honmaru Gomen, a nationally designated important cultural property, and the restored and maintained Tenjin Sazamon, Karadate Ninomon, and Shichibantaiba tell history. The interior of the Reconstruction Tenshu is the Matsumae Castle Museum, where replicated maps and materials related to the Kitamae ship are displayed, and the history of the time can be learned. It takes 40 minutes.