This is one of the "big two real estate for foreigners" in Tokyo. In the front of the building (the one facing the main street), is the Japanese department, and you can access the department for foreigners on a little side street. All the people who work there are foreign (Americans, Russians, etc), so service is quick and attentive. There are lots of apartments and lodgings available throughout the city. You have to pay the first month in advance, and a deposit. The price of cleaning your room when you leave also deducted from the deposit (15.000Y). Payments are made, as I said before, in advance, on the 27th day of the month, by bank transfer or by going to the Nakano office. If you want to lengthen your stay, no problem. The only rule is you have to inform them a month before you leave. If you arrive with suitcases, and the room you choose is far away, they'll take you in a van.