English: Transition between two ways of handling sliding rain shutters in traditional Japanese architecture. Left, three-panel maira-do system. All three grooves run between the pillars. Right, two shoji grooves between the panels, and a groove on the outside of the engawa (veranda) for the rain shutters (ama-do). The ama-do may be slid along, rotated at the corner using the amado-rotator, and finally stacked in the to-bukuro (door cupboard), bottom right. The newer system admits twice ad much light, and gives an unobstructed view of the garden if the lightweight shoji are lifted out and stacked away. This transition was an important part of the early 1600s transition between the shoin and the sukiya styles (shoin-zukuri to sukiya-zukuri).