Very clean and spacious apartment for a couple! Really cool neighbourhood with sumos wandering about as their stable is around the corner from the apartment. Ryogoku JR station is only a short walk away with plenty of food options nearby.
Toshi & Dai are really hospitable and quick to respond to messages. They provided easy instructions to find the apartment and to self check-in/out. The toilet and laundry had to be accessed from the 'outside' but is not really an issue as you have the whole floor to yourself.
Overall a great stay and would definitely recommend it!