On the entry side of the gable-entry Izumi residence there is a do-bisashi or tsuchi-bisashi (土庇), a deep eave supported by posts. In minka of the same type found in the Nishiyama district of Kyо̄to, this element is called the mage (真下), and under it there is a bench-like (endaijou 縁台状) board floor known as a hama-yuka (浜床, lit. ‘shore floor’) or hama-en (浜縁, lit. ‘shore edge’); in the Izumi residence there is an open hiro-en (広縁, lit. ‘spacious edge’), which is a ‘verandah’ (engawa 縁側) or ‘porch’ whose substantial depth gives it greater utility for a range of purposes: in this case, reception of guests (о̄tai 応対), handwork (te-shigoto 手仕事), and drying of cereals (kokumotsu 穀物).
On entering there is a stable (umaya, here maya) on the left and zashiki on the right, completely closed off from the doma (here niwa) with a board wall (ita-kabe 板壁), except for a single-leaf sliding door; this is an old-fashioned method of partition.
The niwa to the rear of the stable contains a sink (nagashi-dai 流し台, here hashiri) and stove (kamado かまど, here kudo) and is used for cooking and farm work; the daidoko, facing and open to the niwa, is the place for activities centred around the firepit (irori いろり). The nando (なんど) at the very rear is used as a bedroom (nema 寝間) and is open to the daidoko only via a single koshi-taka shо̄ji (腰高障子), a sliding panel with an upper half of paper-covered lattice and lower half of thin board; the rest of the nando is completely closed.
The development of this type of minka is illustrated in the first row of four plans shown below. It starts out as a parallel lineup three-room layout (jūretsu-gata san-madori 縦列型三間取り, the first plan). Then, in the second plan, the nando to the rear of the daidoko is moved and the minka becomes a front-zashiki type (mae-zashiki gata 前座敷型) layout; the border between the daidoko and the niwa is now longer, making the daidoko more convenient to use. Additionally, the sink is moved to the rear gable wall, and next to it a rear or back door (ura-toguchi 裏戸口) is added, and the entry doma (doma iriguchi 土間入口) and niwa (にわ) are partitioned off from one another (presumably there is a door in this partition). The opening between the zashiki and doma is widened, and rain shutters (amado 雨戸) are added to the hiro-en, resulting in an ‘enclosed verandah’ (nai-en 内縁).
In the next stage (the third plan), the partition line between the nando and the daidoko is extended forward through the zashiki to divide it into two rooms: a smaller, formal or ‘public-facing’ zashiki, and a living room-like room ima (居間), resulting in a regular four-room layout (seikei yon-madori (整形4間取り). The nando is fully opened up on its daidoko side, reducing its closed character. Finally, the entrance door is moved forward, and the hiro-en is expanded and ‘roomified’ (heya-ka 部屋化).
In the fourth plan, the minka becomes a regular six-room layout (seikei roku-madori (整形6間取り). An ‘entrance zashiki’ (genkan-zashiki 玄関座敷) develops, with attached shikidai (式台), a ‘running board’ type step at intermediate height between the doma or ground and the raised floor. The zashiki are formalised with ‘picture rails’ (nageshi 長押) and equipped with decorative alcoves (toko とこ) and shelves, and a ‘wraparound verandah’ (mawari-en 周り縁) is added to the exterior. The daidoko becomes a central chanoma (茶の間), used only for dining; the rear rooms are bedrooms or storerooms, and are completed by adding closets (oshi-ire 押入) and shelving (todana 戸棚).