Matsuri

This is one of the most weird festivals (matsuri) in Japan. Men are naked during it.
In Japan there are a lot of matsuri.
I have been for example at the Sumidagawa Matsuri in Tokyo (Asakusa) where you can see at the end of it beautiful firweworks for about 1 hour and half at night.
But you need to take a place on the area early in the afternoon or you won't find a place where to seat otherwise.
Another festival I have seen is the Tenjin Matsuri in Osaka.
Really beautiful and interesting.
Finally I also saw the Gion Matsuri in Kyoto, probably the most famous in Japan.