A couple of weeks ago I went to Tokyo with a few other JETs. It was a last minute decision to go so I had to take the Shinkansen down there rather than the night bus. we all managed to stay with a friend of one of the people I was traveling with, and hung out with them for a couple days.
I went to Edo Castle, Shibuya, Akihabara, Harajuku, Meji Shrine, Yoyogi Park, and Odaiba.