[redko]

This may give some ideas of pre-war densities and terrain:

Kyushu 1897

Little question for you, maybe you have an idea...

Do you know if Japanese cities from WW2 period have hypodamian style urbanism with rectiniear streets, so new "new world style" (north middle and south america) or a more destructurated and chaotic style like cities of europe ?

I found some pics from Hiroshima and it look like european cities.