The work left crowds of commuters temporarily stranded Tuesday as local lines and the long-range bullet trains that link Tokyo with other cities were halted as a safety precaution.
The bomb found at a construction site was reportedly Japanese. The rusty bomb was about 40 centimeters long. It was destroyed on the site, which was sealed off. No one was injured.
A large amount of unexploded ordnance is still found in Tokyo and other areas that were heavily bombed before Japan’s 1945 surrender ended World War II. Most of the duds were dropped by the United States, but some were buried or lost by the Japanese military as well.