Nice place, residential area, 3 minutes from a convenience store. very clean looking, however we were sneezing throughout the entire 10 day stay, and there was dust when passing your finger on wall fixtures etc). The living room is seriously tiny, the layout is basically a corridor which opens up to a 5 square meter room (barely enough to put a small bed). Every single cm is accounted for, it’s tricky to even put your suitcase anywhere without it getting in the way. Then there is a ladder (think fireman ladder, so you better be fit enough and have zero mobility issues) which you must manually hook up (this occupying the entire living room) every single time you need to gain access to the top floor. The top floor ceiling is very low (maybe 1m55 in height) and about 15 square meters with a double futon bed. So basically it quickly feels quite claustrophobic for two unless you’re out and about all the time.
Amenities are ok, barebones but clean. It is a new construction so everything is modern (toilets etc for instance). On the whole the host was very good and responsive but in conclusion this place is cramped (sorry, the mezzanine doesn’t make up for it), you’ll spend most of your time in 5 square meters. Small even by Tokyo standards.