Coming back from Koya-san, I spent a couple of hours in Osaka to do some sightseeing. It was more than enough, as Osaka is just another megalopolis in Japan, with very few tourist spots. Here you have a couple of pictures showing one of the musts in Osaka, its castle…

All big cities in Japan are the same. Some very old buildings (most of the reconstructed, though), with amazing new buildings, and most of the times, very close one to each other.