I stayed at Michi's apartment for a month and I thought it was definitely suited for one person! The kitchen was well-equipped with utensils, pans, etc. and in general, the accommodation offers a lot of useful amenities. I stayed on the 4th floor which is roof level, so you do have direct access to the washing machines, but you also need to walk up the stairs (there is no elevator). All around, a great stay and very well connected to the Ginza Line!