North Korea is estimated to have 10 - 20 bombs [1], and their bombs would have a similar yield to the two that were used in Hiroshima and Nagasaki. Presumably,

North Korea is estimated to have 10 - 20 bombs [1], and their bombs would have a similar yield to the two that were used in Hiroshima and Nagasaki. Presumably, only a fraction of the North Korean stockpile would be used against Japan (they would also want to attack targets in South Korea). This is much less than the American bombings of Japan in World War 2, when 60 Japanese cities were firebombed (see e.g. [2]). But even so, the total deaths in Japan in the entire war were something like 4% of the population. If there is a war now, most people living in Japan will survive. [1] https://fas.org/issues/nuclear-weapons/nuclear-notebook/ https://fas.org/issues/nuclear-weapons/nuclear-notebook/ [2] https://www.japantimes.co.jp/news/2015/03/10/national/deadly-wwii-u-s-firebombing-raids-on-japanese-cities-largely-ignored/ https://www.japantimes.co.jp/news/2015/03/10/national/deadly...