This is an interesting and different part of Tokyo but also becoming highly touristic. This small area in the north of Tokyo (from Shinjuku, direct with either metro or train, stop in Nippori) that was not bombarded during WWII and therefore still enjoys low wooden houses and a lot of shrines.
It has been a beautiful day out for me, this is quiet if you go and walk along the shrines towards Yanaka Cementery. You may want to go to Yanaka Ginza high street where there are many shops, bars, and tourists. I was not highly impressed by this part but the walk around was worth the trip.