On March 27, 2008, an unexploded 1-ton bomb thought to have been dropped in an April 7, 1945 U.S. B29 air raid was discovered buried in a neighborhood yard along the train tracks. Japan Self Defense Force experts have assured the city that there is no danger of explosion without strong impact so the yard has been cordoned off and security personnel have been dispatched to keep watch while the city informs the neighbors of disposal procedures and precautions. The city has announced plans to regulate traffic and clear a 500 meter radius of neighborhood around the bomb on May 18 for disposal of the unexploded ordnance. We're about 700 meters away but there are two stations and quite a few residences and businesses, including a 32 floor high rise apartment and two large supermarkets within the evacuation area. Apparently the Keio Line's underground train line pre-construction magnetic exploration and stories of the April 7th air raid led to the discovery. Maybe the entire neighborhood can come watch this year's city-wide kiddy sumo that day at the American School in Japan on the very far side of Chofu from anything (well outside of the 500 meter radius).