In the Coloured Shoin teahouse Sen no Rikyū stained the timbers with a mixture of Bengal red dye and black dye to make them look sooty and old. In contrast, his student's Oribe and Enshu preferred brighter colours and natural finishes. It is thought that this change coincided with the development of the regular wood plane that allowed a more consistent finish to wood and a better appreciation of the natural qualities of unfinished wood. It is a trait that has characterised the sukiya style since. After the
Meiji Restoration in 1867 the samurai class and thus the shoin-style lost its reason for being whereas the sukiya style continued to develop and was reassessed for
modernist architecture. The sukiya style requires a subtle harmony between the principles required in its construction, these include the relationship between the client, the architect and the carpenter. Both the architect and the carpenter should have a profound understanding of the materials employed. There is an example of a carpenter asked to build a sukiya style house declining because he lost his tools in World War Two and he felt that he would not be in a position to work satisfactorily. Writing in 1934 the architect
Isoya Yoshida encouraged architects to design in the sukiya-style using modern materials. He said that it was important to display the natural characteristics of the wood although it would be a mistake to use anything that might catch the eye as this was not in the spirit of the style. Though originally conceived in natural materials, primarily wood, sukiya style adapted itself to modern materials, namely concrete and steel, as builders and architects seek to incorporate sukiya interior design elements into modern buildings in an urban environment. This is not seen as a dilution of the design idiom -- as architectural historian Teiji Itoh points out, "in its formative years, the sukiya tradition was concerned primarily with interior design. ... Sukiya style is well suited to [modern buildings] because it is concerned primarily with conforming a certain decor to an already established spatial entity." That said, in most cases, sukiya design in an urban setting is far from the original spirit of a "mountain retreat in the city" as it was conceived in the 16th century Japan of Sen no Rikyū.
Shutter systems The transition between the Shoin and Sukiya styles occurred during the early 1600s, as a new structure for storm shutters was devised. By stacking the opaque wooden sliding doors in a box called a to-bukuro, instead of simply overlapping them, the amount of light in the interior doubled, and unbroken views of the garden could be obtained. The lede picture of the transitional
Katsura Imperial Villa shows both systems. File:Nijo Castle J09 40-focused-right (cropped to retainer's hall).jpg|On the right, three grooves, three panels. The
maira-do are open, and the single
shōji panel closed; half of the area is still filled with the maira-do. The building to the left is newer; its outer groove runs outside the pillars. The shutters are packed away in the to-bukuro in the corner, and the shōji in the inner two grooves run uninterrupted. File:Castello nijo 03 ohiroma ichi-no-ma.JPG|From the inside, light levels are lower. The reflective gold paint used extensively in
Shoin style buildings helps compensate. File:PocketDoorM0575.jpg|The corner of this temple has two to-bukuro cupboards, which the doors can slide into without having to be lifted and carried away. File:Storm-door,amado,narita-city,japan.JPG|Ama-do rotator; outer ama-do groove cut away for half an ama-do width on each side. Glass doors and shōji get two grooves each. File:Mairado-to-amado, shoin-to-sukiya-style.svg|Plan view of the mairado and amado shutter systems, showing rotator and to-bukuro. The black squares are pillars;
shōji in white, rain shutters in black, grooves in grey. File:JapanHomes103 SECTION THROUGH VERANDAH AND GUEST-ROOM (SVG).svg|Section through a Sukiya-style middle-class home In the first half of the 1600s, at the beginning of the Edo period, the outermost groove was moved outside the line of pillars. The wooden shutters placed in this groove interlocked edge-to-edge, and were called
ama-do (雨戸, "rain-door"): they were storm shutters, used only at night and in poor weather. (戸袋, とぶくろ: literally, "door-container"). The to-bukuro might be designed to swing out of the way. The inner two grooves remained as they were, but both could now be filled with shōji, doubling the number of shōji in a building. Lightweight shōji could be lifted out and carried away easily. This new structure allowed the entire side of the building to be opened, giving either twice as much light, from an uninterrupted wall of shoji, or an unobstructed view of the garden; gardens changed accordingly. Amado also served to secure buildings, and might have
nejishimari (screw-in lock on the edges). They might also have
musōmado, vents which
shuttered with sliding vertical slats, an allowed some light and air in when the shutters were closed. Later,
garasu-do, glass sliding doors, were added between the ama-do and shoji. ==Influence==