Hisao is a great host. He is patient in explaining the rules. He was kind enough to provide us with breakfast (Egg salad sandwich + zucchini + chicken/ham) and 2 chocolate biscuits.
The room is located a separate building from Seidokan. To check in, go to the 2nd floor of Seidokan (just bring your passport, leave your luggage on the ground floor as the staircase is narrow). After the adminstrative work is done, Mr. Hisao will bring you to the next building where all the apartments are located.
The room has pretty much everything you need. It has a balcony, toilet, shower, bath, kitchen, wardrobe, bench table, single chair, and a TV.
The toilet is rather small as is with most Japanese houses. It does not have a heated seat/bidet.
The beds are 2 single sized. One has a soft mattress, the other has a stiffer mattress.
Amenities include towels, soap, shampoo, hangers, hair dryer, electric kettle.
The kitchen has an electric stove, a knife, 2 bowls, 2 plates, 2 soup plates, 2 forks, 2 spoons, 2 knives, 2 teacups, 2 glasses, 1 teapot, 1 soup pot.
The location is a very quiet and peaceful neighborhood. There is only one 7-11 nearby.
The 2 nearest station are
Iriya (Tokyo Metro - Hibiya Line) Exit 4
Uguisudani (JR - Keihin Tohoku/Yamanote Line) North Exit
There are 4 or so supermarket near the stations. They are mostly small and lack variety. My favourite is Inageya Supermarket (near Iriya Exit 3). It has 2 floors of goods.
Overall, this is a good location to stay at if you like a quiet neighborhood. The walk may be a little long but the route is rather direct. You get to experience the tranquility of the neighborhood.