"Honestly I recommend and interwhao house (
http://quick-house.com). I live in one.
They are clean, you get a private room of 6+ tatami mats in size plus a BIG closet (big enough to sleep in if your insane). The living areas (kitchen, bathroom, dining and living) are MUCh bigger than cozyhouse and they are cheaper."
Don't know about Cozyhouse but I'm at an Interwhao house and I wouldn't particularly recommend them. Kitchen is tiny although dining/common room is huge. NOT at all clean. Luckily there are supermarkets nearby for when we need the loo and clean showers when I go to the gym. Guess it depends what one you live in. The company itself is a bunch of lying so-and-sos.
Where are you living FirstHousePooka?