I would say it kinda depends on your interests. I loved staying overnight on Miyajima because it was quiet and the torii gate was all lit up - quite a change from the day crowds. But if nightlife is your thing, there is NOTHING there...most places close at five or six, as the day business is enough and everybody clears out.
Hiroshima on the other hand has lots of restaurants and places to go in the evening, so if you want activity, I'd say plan to stay there.
-:- Message from TripAdvisor staff -:-
This topic has been closed to new posts due to inactivity. We hope you'll join the conversation by posting to an open topic or starting a new one.
To review the TripAdvisor Forums Posting Guidelines, please follow this link: http://www.tripadvisor.com/pages/forums_posting_guidelines.html
We remove posts that do not follow our posting guidelines, and we reserve the right to remove any post for any reason.