Yoshi's place is great for a family or group. Check in was really easy despite the late hour and it was easy to feel at home. The place is spacious compared to most Japanese apartments, with a large bedroom and separate living room housing the fifth and sixth beds. Kitchen was a good size and well stocked with everything you could need, the bathroom is a good size and it comes with its own laundry facilities. There was plenty of warm and comfy bedding, towels and toiletries etc.
The location is great - Ryogoku is renowned as a sumo training centre and you're guaranteed to see trainee sumo walking around the station. Skytree and Asakusa are both very close (we walked with a 7 year old and a baby in a pram to give you an idea of how close), and the two rail stations make getting around easy. You're two stations from the Yamanote Line (Akihabara, Ueno, Ikeburo, Shinjuku, Shibuya etc) which is really convenient. Kinshicho is walkable too and has great food.
Thanks Yoshi! We'll be back!