[quote=VF1-X5]thought roppongi was a little more dangerous at night versus shinjuku?
id say it's the opposite. the red light district is in shinjuku. roppongi is loaded with expats. these expats are not dangerous, most of them work at wall street firms nearby. its a very fun area and people party pretty hard there until all hours of the night, every night of the week. its not like nyc (where i live) - it keeps going at regular bars all night - until dawn. there are the occasional nigerian dudes on corners handing out flyers to clubs but i dont consider any area of rappongi dangerous at all. shinjuku is a place where some seedy joints exist.
to be honest, if i had one night in tokyo, i prob would not go to shinjuku, unless i was looking for something that could be found in a red light district. (ps the park hyatt hotel where lost in translation was filmed is in shinjuku, but there is really nothing close by it other than gov't buildings.)