Delving the history of foghorn buildings in Japan, this paper shows that most of them were built on the cape of Hokkaido and Tohoku area between 1879 and 1932, and their construction materials were changed from steel in Meiji period to concrete in Taisho period. In the Meiji period, they were designed as a rectangular room with a vaulted roof and all made of steel panels. The Inubosaki's foghorn building is the latest, largest, and well-designed one of them. It is also the last one in existence, therefore it is now having a new value as a cultural asset.
