In the waning days of World War II, American bombers drop napalm canisters on Japanese cities, creating fire storms. These bombs, longer than a tin can but about as big around, fall to earth trailing cloth tails that flutter behind them; they are almost a beautiful sight. After they hit, there is a moment’s silence, and then they detonate, spraying their surroundings with flames. In a Japanese residential neighborhood, made of flimsy wood and paper houses, there is no way to fight the fires.