The “ordinary nagaya" depicted in Figure 3 shows the standard interior arrangement of the rooms. The most common layout was a room which measured about 10 square meters and included a 4.5-tatami mat living room with a kitchen space and entrance. The room constituted one housing unit, or “dwelling,” and often housed family as well as non-family members. Room sizes varied, however, ranging from the smallest, a single 3.3 square meter, 2-mat room, to large double rooms of more than 10 mats. Some families are known to have rented as m any as three rooms at one time. (Later, the 1911 statistics on the structure of slum housing indicate that people renting average-size rooms (4- 45 tatami mats) grew to include 80 per cent of all tenants in Kanasugi-Shitamachi and to more than 40 per cent in Mannen-cho.