Not a very difficult place to locate. Nearest station is Okubo, you can walk from Shinjuku (west side) Station, it take about 10 mins with lots of things to look around. The apartment is what that are shown on the pictures posted. I was expecting a regular service from owner. First, the location and address were given to us when we asked. Then She showed us some pictures and gave us an address and that is all. When we arrive, we notice that we did not have the combination lock pass code, and we had to call. She responded. We stayed 4 nights and had only 1 towel each for all the days. So I called and asked and at the same time to get help on the stove. She came to the apartment and show us how to use the stove and almost left the room without telling us the towels. When asked she said no, fresh towels everyday. Just one. I was shock! I cannot believe it, but I had no choice. I almost went mad.
When we arrived at her apartment, it was our 6 days to travel, and need to do some laundry. To my shock again, the washing machine is outside the room where the balcony is. Which means open area. I quickly look inside of it, it was filled with dirt, I suppose it was not used for a long time. Bed sheets were so used and old (but clean), almost list my floor cloth. 2 sofa beds, one has a hole in it. Try to sleep on it you will sink in. Room is very dated, old not so well kept. Very disappointed to have taken this choice. If you are not fussy with such place, you can try. Location is a place where all the foreign people stays, there are tuition centers for foreign students. You will find almost 65% of the people there are not local.
Toilet is so small that you cannot change your clothes without getting them wet.