The room was okay (it is more a small apartment, actually), quite small for 3 adults. It has basic amenities for cooking (only 1 frying pan) and eating (exact number of plates, bowls, utensils & mugs given...no extras). The place was clean when we arrived; however, since we stayed for a week, we had to do the cleaning ourselves and washed the (very very thin) towels provided.
Getting the key to the apartment is quite inconvenient, as you still have to travel by train to get to the owner's place to get the key & the wifi. If you have big suitcases and isn't familiar in Japan, you could get lost. The instructions to get to the owner's place will be sent to you in a VERY HEAVY Adobe Acrobat file a few days before arriving. We were lucky because we have family in Osaka, so we were able to drive to his place.
Another strange arrangement with this apartment is that you will have to leave cleaning money when you leave. Shouldn't it be part of the payment already? The owner isn't accommodating either. Very aloof, prefers to just keep sending you the "House Manual" when you make an inquiry.
The apartment is very conveniently located though. It is right in Nihonbashi, very near Takashiyama...walkable to Dotonbori & Shinsaibashi. It is near Osaka Namba train station as well. Lots of shopping and eating places to walk to.
Our stay was okay, however, we will make this our last resort the next time we are here.