Much of Tokyo's housing dates from after the Great Kantō Earthquake of 1923, and a great deal is very recent. This is the Modernist Okuno Building which housed Ginza's oldest apartments, and is unchanged since it was built in 1932, one of the few early Showa-era buildings still standing in central Tokyo. Today, however it is no longer residential but houses galleries, antique shops, businesses,  and Room 306 which has been preserved by volunteers and can be visited.