Where did all the rubble and ruins go after WW2? How long did it take to clear and were there places with noticeable ruins 10, 20 years later?

by frugalgardeners
voyeur324

There are relevant answers by /u/sickhobbit and /u/bigglesworth_ in the thread Who and how did people clean up a city or battlefield during WWII?

/u/Starwarsnerd222 has previously answered from a more political perspective What happened to Japan after WWII?