The aim of this paper is re-construct a fire field near epicenter of Hiroshima A-bomb in 6 August 1945. For this purpose, we used the official records in Hiroshima Genbaku Sensaishi (Hiroshima A-bomb Damages) and plotted spot (town)-specific fire status on a map in order to visualize easily. Our visualized map showed that fires in 21 spots started just after dropping A-bomb and the fire spread with the passage of time. Finally, the fire started in most of the spots of the area within a radius of 2 km of the hypocenter by approximately 15:00. The fire in ten spots was not putout during August 6. The area was on the east side of the Hiroshima city.