The four room type (yon-madori gata) represents something of a point of completion or fulfilment in the evolution of the minka, having first appeared in the relatively advanced and affluent Kinki region at the beginning of the Edo Period (1603 - 1867), and from there spreading around the country.
In this type, as the name suggests, the raised floor portion of the minka is divided into four rooms; in the paradigm example below, the divisions are in the form of a cross, known in Japanese as the ta-no-ji-gata-madori, ta being the Japanese character for rice paddy, ‘田’. In this example the four rooms are the ‘everyday’ room, here called the dei; behind it the katte for eating; the formal zashiki; and behind it, the heya for sleeping.
In the following examples the rooms have different names, but the functions are the same. In them we can see how the ta form can be easily adapted to meet the ‘weighting’ requirements of the various rooms, simply by shifting one of the lines of partition off centre.
Any later development of the minka beyond the four room type, such as minka with five, six, or more rooms, or minka with multiple wings or other complex plan-forms, is limited to a relatively small number of examples of upper class dwellings rather than types per se, and are thus difficult to fit into any generalising classification system.