The Shops of Central Road

South exit from Koenji station,
Turn left,
Keep going past McDonalds and the Mizuho Bank ATM,
You will come to Central Road.
At the top, it's a bit seedy, with what could be described as Koenji's red light area, or one of them anyway: http://koenji-live.blogspot.com/2009/01/gentlemans-relaxation-zone.html

Once past that, you got some small bars, restaurants, Japan's only Tesco's(!), junk shops, and some of the best decorated shop fronts in Tokyo.
This is just two of them:
Nincompoop Capacity and Garter.
Someone's let their creative juices flow with these.

Gentleman's Relaxation Zone

Not quite offering the services that somewhere like Kabuki-Cho might offer, Koenji still has a small area for the late-night businessman to pop in on his way home from a 16-hour day.

Just a few sex parlours, with some dodgy looking blokes outside to usher you away in case you might have the urge to stray into their "no foreigners" establishments.