... this hotel review is mostly being reviewed by someone easily pleased so decide for yourself based on what comfort you like in a room.
The room is really small and consists of a thin futon on a tatami floor (but there are rooms that have a twin size western style bed - I saw them cleaning one once when I went back to my room) and with the futon supported by a foldable cushion to make it softer. It has a small table that you can only use by sitting on the floor, a cupboard for clothes with a few hangers, mini fridge to store your food and a really old tv. The view from the room only let's you see the windows from other rooms so of you like privacy you might want to draw the curtains closed. There's also a heater in the room with a remote but the buttons are, of course, in Japanese so you might want to look up an online translation for the buttons to avoid using the cold air feature (I had to do it since I accidentally used the air conditioner feature once).
As mentioned, your room doesn't have a bathroom so if you need to use the facilities you go to another room. It's a same sex bathroom so you might end up seeing a male peeing in a urinal on your way to the toilet. But it has a western and Japanese style toilet with a nice Toto bottom washing, bidet and warm seat installed.
There is a woman's and a separate men's shower so you won't need to be worry about someone coming in. The front desk gives you a key to access the room and then you can lock it behind you.