On the first of September in 1923, the Great Kanto earthquake struck, and Yokohama was devastated. Fires broke out across the city, and the foreign-style buildings of the Yamashita district collapsed. Afterward, the city had mountains of debris and nowhere to put it. The answer was the sea just in front of the old waterfront street. Burned earth, rubble from the long stairway at Motomachi, and charred bricks from Yamashita were tipped into the water to make new land, and many citizens joined the work by pulling handcarts. The seawall work began in 1925, and the park was completed and opened in March of 1930. Once the fill was in place, it was covered with good soil so that a garden could grow on top of the ruins. Yamashita Park is recognized as the first seaside urban park in Japan, created as part of the earthquake reconstruction. Even the name has a little story. The city of Yokohama proposed calling it Kaigan Park, meaning Seaside Park, but the government's choice, Yamashita Park, won out. The design was the work of the Home Ministry's Reconstruction Bureau, which widened the old waterfront street into a new seaside promenade.