"we had a 3 persons room (1 double bed and 1 single bed). it was perfect for our family with plenty of space to store 3 suitcases and spread out of shopping bags before packing up and heading back home. The room and the hotel was in excellent condition. The check-in was fast. Despite being near a very large road connector the room was fairly quiet (to the exception of some crazy motorbike drives once in a while) because they used double glass windows. And the location is perfect: basically at Namba subway station, right next to Dotonbori, yet away from the crowded area, and close enough to Namba Nankai station that you can walk there with suitcases in less than 10min.
I would highly recommend to stay at this Toyoko-Inn when in Osaka."