renovated. In 1686, the Inaba were transferred, and the Ōkubo clan returned to Odawara, with the domain expanded in kokudaka to 103,000 koku. The castle suffered great damage during the 1703 Genroku earthquake, which destroyed most of the castle structures. The donjon was restored by 1706, but the rest of the castle took until 1721. Extensive damage occurred again during the 1782 Tenmei earthquake and once more during the 1853 Kaei earthquake. During the Boshin War of the Meiji restoration, Ōkubo Tadanori permitted the pro-Imperial forces of the Satchō Alliance to pass through Odawara on their way to Edo without opposition. Odawara Castle in the modern era The new Meiji government ordered the destruction of all former feudal fortifications, and in compliance with this directive, all structures of Odawara Castle were pulled down from 1870–1872. In 1893, the stone base of the former donjon become the foundation for a Shinto shrine, the Ōkubo Jinja, dedicated to the spirits of the generations of Ōkubo daimyō. In 1901, the Odawara Imperial Villa was constructed within the site of the former inner and second bailies. The Imperial Villa was destroyed by the 1923 Great Kantō earthquake, which also caused many of the stone facing on the castle ramparts to collapse. Repair work was made to the stone walls from 1930–1931, but with very poor workmanship. In 1934, two of the remaining yagura (which had been destroyed in the 1923 earthquake) were restored, but on a half-scale. In 1938, the castle site was proclaimed a National Historic Site, with the area under historic preservation restrictions expanded in 1959, and again in 1976 based on further archaeological investigations. In 1950, repairs were made to the stone base of the former donjon, which had been in ruins since the Great Kantō earthquake, and the area was made into the Odawara Castle Park, which included an art museum, local history museum, city library, amusement park and zoo. The three-tiered, five-storied donjon, the top floor of which is an observatory, was rebuilt in 1960 out of reinforced concrete to celebrate the 20th anniversary of the proclamation of Odawara as a city. However, the reconstructed donjon is not historically accurate, as the observation deck was added at the insistence of the Odawara City tourism authorities. Plans have been discussed since the late 1960s on a more accurate restoration of the central castle grounds to its late Edo period format.