The owner will try their best to accommodate any requests, but be sure to check with them about it in advance. There are plenty of toilets and kept clean. The building is really super close to the Nakai station, just be sure to follow the north exit of Seibu Shinjuku and you will not need to walk a lot. If you are a solo traveler looking for an affordable rated place just enough to crash after long day outside, this place is great value for your money. Thanks !