WWII fire-bombing of Tokyo by US remembered 70 years onClose Seventy years ago on the night of 9-10 March, in the Japanese capital, 334 American B-29 bombers dropped thousands of tonnes of incendiary bombs on the city's crowded wooden neighbourhoods. They started a fire storm that burned at over 1,000 degrees and killed more than 100,000 people. It was an event that dwarfed even the atomic bombing