The room is miniature with basic amenities. We found hard to move in the room even both of us are quite slim and tall. You have to clear the living room in order to open the suitcase. Not highly recommend, but if you are slim (~50-55 kg) and tall (~170cm) like us, this can be one of your considerations.
The room price per night is a great deal. However, adding the admin charge and cleaning fee, there could be more choices.
Location itself is convenient, 5mins walk to supermarket and convenient store, 10-15mins walk to the Aquarium, 20-25mins walk to Ikebukuro. Point to note, the building is around 2 blocks away from the graveyard.