Hiroshima Nagasaki Day It is the worsts day in the history of japan because the 2 bombs namely - In Hiroshima - Little Boy In Nagasaki - Fat Man they destroyed almost every thing , Lands and destroyed many building . The most worst thing was when it was reported that more then 129,000 and 226,000 people were killed in this attack . orders were issued on 25 July for atomic bombs to be used against Hiroshima, Kokura, Niigata, and Nagasaki. These targets were chosen because they were large urban areas that also held militarily significant facilities. On 6 August, a Little Boy was dropped on Hiroshima, to which Prime Minister Suzuki reiterated the Japanese government's commitment to ignore the Allies' demands and fight on. Three days later, a Fat Man was dropped on Nagasaki. Over the next two to four months, the effects of the atomic bombings killed between 90,000 and 146,000 people in Hiroshima and 39,000 and 80,000 people in Nagasaki