Last Tuesday I went karting with some friends in Tokyo, around 北千住. The place is called City Kart, you can rent the course for ¥36.000/hour on weekdays with 5 200cc karts which I think is a pretty awesome pricetag considering the location.
It is right next to the 京成関屋 train station or 10min walk from 北千住. More photos in the flickr set.